The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0793930946ac0805c9e594d82b7e39197925ca33

commit 0793930946ac0805c9e594d82b7e39197925ca33
Author: Kyle Qian <kyleqian@google.com>
Date: Mon Jul 09 19:43:27 2018

Implement HashUtils for CrOS Nearby.

This CL includes the implementation class for the abstract class
HashUtils defined in the Nearby library. It implements a string-based
interface for MD5 and SHA-256 hashing.

Because the actual Nearby library has yet to be merged into the CrOS
directory, this CL includes stand-in Nearby abstract classes under
the temporary directory //chromeos/components/nearby/library.
This directory will be removed after the Nearby library gets imported
to //third_party (in-progress CL:
https://chromium-review.googlesource.com/c/chromium/src/+/1113198).

Bug: 861813
Change-Id: I41dc7d74d5913ae8168041c82d3cacf70628ce19
Reviewed-on: https://chromium-review.googlesource.com/1119492
Commit-Queue: Kyle Qian <kyleqian@google.com>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Adam Langley <agl@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#573409}
[modify] https://crrev.com/0793930946ac0805c9e594d82b7e39197925ca33/chromeos/components/BUILD.gn
[add] https://crrev.com/0793930946ac0805c9e594d82b7e39197925ca33/chromeos/components/nearby/BUILD.gn
[add] https://crrev.com/0793930946ac0805c9e594d82b7e39197925ca33/chromeos/components/nearby/DEPS
[add] https://crrev.com/0793930946ac0805c9e594d82b7e39197925ca33/chromeos/components/nearby/OWNERS
[add] https://crrev.com/0793930946ac0805c9e594d82b7e39197925ca33/chromeos/components/nearby/hash_utils_impl.cc
[add] https://crrev.com/0793930946ac0805c9e594d82b7e39197925ca33/chromeos/components/nearby/hash_utils_impl.h
[add] https://crrev.com/0793930946ac0805c9e594d82b7e39197925ca33/chromeos/components/nearby/hash_utils_impl_unittests.cc
[add] https://crrev.com/0793930946ac0805c9e594d82b7e39197925ca33/chromeos/components/nearby/library/BUILD.gn
[add] https://crrev.com/0793930946ac0805c9e594d82b7e39197925ca33/chromeos/components/nearby/library/byte_array.h
[add] https://crrev.com/0793930946ac0805c9e594d82b7e39197925ca33/chromeos/components/nearby/library/hash_utils.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1d94c608a49651a7f5073360ec8e7f319b46a2c5

commit 1d94c608a49651a7f5073360ec8e7f319b46a2c5
Author: Kyle Qian <kyleqian@google.com>
Date: Tue Jul 17 18:57:40 2018

Implement CountDownLatch for CrOS Nearby

This CL includes the implementation class for the abstract class
CountDownLatch defined in the Nearby library. It is a synchronization
aid that allows one or more threads to wait until a set of operations
being performed in other threads completes.

Because the actual Nearby library has yet to be merged into the CrOS
directory, this CL includes stand-in Nearby abstract classes under
the temporary directory //chromeos/components/nearby/library.
This directory will be removed after the Nearby library gets imported
to //third_party (in-progress CL:
https://chromium-review.googlesource.com/c/chromium/src/+/1113198).

Bug: 861813
Change-Id: I8d018e16a83760fae23acb0f2f3d92dee88ce9bc
Reviewed-on: https://chromium-review.googlesource.com/1123017
Commit-Queue: Kyle Qian <kyleqian@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575737}
[modify] https://crrev.com/1d94c608a49651a7f5073360ec8e7f319b46a2c5/chromeos/components/nearby/BUILD.gn
[add] https://crrev.com/1d94c608a49651a7f5073360ec8e7f319b46a2c5/chromeos/components/nearby/count_down_latch_impl.cc
[add] https://crrev.com/1d94c608a49651a7f5073360ec8e7f319b46a2c5/chromeos/components/nearby/count_down_latch_impl.h
[add] https://crrev.com/1d94c608a49651a7f5073360ec8e7f319b46a2c5/chromeos/components/nearby/count_down_latch_impl_unittests.cc
[add] https://crrev.com/1d94c608a49651a7f5073360ec8e7f319b46a2c5/chromeos/components/nearby/library/count_down_latch.h
[add] https://crrev.com/1d94c608a49651a7f5073360ec8e7f319b46a2c5/chromeos/components/nearby/library/exception.cc
[add] https://crrev.com/1d94c608a49651a7f5073360ec8e7f319b46a2c5/chromeos/components/nearby/library/exception.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/017a1bcf5cc6b8f82f389fd08c3754508c486c20

commit 017a1bcf5cc6b8f82f389fd08c3754508c486c20
Author: Kyle Qian <kyleqian@google.com>
Date: Wed Jul 18 18:30:41 2018

Update CountDownLatchImpl to Match Specifications

This CL changes the constructor for CountDownLatchImpl to use a DCHECK
to disallow initialization counts less than 0. An initialization count
of exactly 0 is still allowed, in which case countDown() will never
Signal() its WaitableEvent, and all calls to Await() will immediately
return.

Bug: 861813
Change-Id: Ic7807544c792be010f46ca58391a02f64ab1638e
Reviewed-on: https://chromium-review.googlesource.com/1141101
Commit-Queue: Kyle Qian <kyleqian@google.com>
Reviewed-by: Gabriel Charette <gab@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Ryan Hansberry <hansberry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576144}
[modify] https://crrev.com/017a1bcf5cc6b8f82f389fd08c3754508c486c20/chromeos/components/nearby/count_down_latch_impl.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b3562b267160bfba6e97fcf98b0a68c1f1f5d23c

commit b3562b267160bfba6e97fcf98b0a68c1f1f5d23c
Author: Kyle Qian <kyleqian@google.com>
Date: Thu Jul 19 21:52:29 2018

Implement SettableFuture for CrOS Nearby.

This CL includes a concrete implementation for the abstract class
SettableFuture defined in the Nearby library. A SettableFuture is a
type of Future whose result can be set, and a Future represents the
result of an asynchronous computation. No concrete implementation of
the abstract class Future will be provided, as it is expected that
the provided SettableFuture implementation can be used as a Future
as well.

Because the actual Nearby library has yet to be merged into the CrOS
directory, this CL includes stand-in Nearby abstract classes under
the temporary directory //chromeos/components/nearby/library.
This directory will be removed after the Nearby library gets imported
to //third_party (in-progress CL:
https://chromium-review.googlesource.com/c/chromium/src/+/1113198).

Bug: 861813
Change-Id: I41808a7a82a03e72d30b5221a13fc9014ba32cf3
Reviewed-on: https://chromium-review.googlesource.com/1137095
Commit-Queue: Kyle Qian <kyleqian@google.com>
Reviewed-by: Ryan Hansberry <hansberry@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576648}
[modify] https://crrev.com/b3562b267160bfba6e97fcf98b0a68c1f1f5d23c/chromeos/components/nearby/BUILD.gn
[add] https://crrev.com/b3562b267160bfba6e97fcf98b0a68c1f1f5d23c/chromeos/components/nearby/library/future.h
[add] https://crrev.com/b3562b267160bfba6e97fcf98b0a68c1f1f5d23c/chromeos/components/nearby/library/settable_future.h
[add] https://crrev.com/b3562b267160bfba6e97fcf98b0a68c1f1f5d23c/chromeos/components/nearby/settable_future_impl.h
[add] https://crrev.com/b3562b267160bfba6e97fcf98b0a68c1f1f5d23c/chromeos/components/nearby/settable_future_impl_unittests.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ffafde96b302d7eadbade41d463541adaec0232c

commit ffafde96b302d7eadbade41d463541adaec0232c
Author: Kyle Qian <kyleqian@google.com>
Date: Thu Jul 19 23:54:37 2018

Implement ThreadUtils for CrOS Nearby.

This CL includes a concrete implementation for the abstract class
ThreadUtils defined in the Nearby library. This class currently only
contains the method sleep(), which causes the currently executing
thread to sleep for a specified number of milliseconds.

This CL also adds missing file entries into nearby/library/BUILD.gn.

Because the actual Nearby library has yet to be merged into the CrOS
directory, this CL includes stand-in Nearby abstract classes under
the temporary directory //chromeos/components/nearby/library.
This directory will be removed after the Nearby library gets imported
to //third_party (in-progress CL:
https://chromium-review.googlesource.com/c/chromium/src/+/1113198).

Bug: 861813
Change-Id: I8c78673bc42ee38b4667fd0fbc7118ee422b3393
Reviewed-on: https://chromium-review.googlesource.com/1144417
Commit-Queue: Kyle Qian <kyleqian@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576701}
[modify] https://crrev.com/ffafde96b302d7eadbade41d463541adaec0232c/chromeos/components/nearby/BUILD.gn
[modify] https://crrev.com/ffafde96b302d7eadbade41d463541adaec0232c/chromeos/components/nearby/library/BUILD.gn
[add] https://crrev.com/ffafde96b302d7eadbade41d463541adaec0232c/chromeos/components/nearby/library/thread_utils.h
[add] https://crrev.com/ffafde96b302d7eadbade41d463541adaec0232c/chromeos/components/nearby/thread_utils_impl.cc
[add] https://crrev.com/ffafde96b302d7eadbade41d463541adaec0232c/chromeos/components/nearby/thread_utils_impl.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5a103d4af878aa956d0818317ef74ad146109176

commit 5a103d4af878aa956d0818317ef74ad146109176
Author: Kyle Qian <kyleqian@google.com>
Date: Tue Jul 31 00:35:53 2018

Implement SystemClock for CrOS Nearby.

This CL includes a concrete implementation for the abstract class
SystemClock defined in the Nearby library.

SystemClock currently contains a single method elapsedRealtime(),
which is expected to return time in milliseconds since boot, including
time spent in states such as suspension (closed lid). The
implementation in this CL, however, does not include time spent in
suspension due to a current limitation of the POSIX implementation of
base::TimeTicks::Now(). See https://crbug.com/166153 for info.

Because the actual Nearby library has yet to be merged into the CrOS
directory, this CL includes stand-in Nearby abstract classes under
the temporary directory //chromeos/components/nearby/library.
This directory will be removed after the Nearby library gets imported
to //third_party.

Bug: 861813
Change-Id: I194880c75c4a8ba3afa37b6b3c916485c065f20f
Reviewed-on: https://chromium-review.googlesource.com/1150822
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Ryan Hansberry <hansberry@chromium.org>
Commit-Queue: Kyle Qian <kyleqian@google.com>
Cr-Commit-Position: refs/heads/master@{#579255}
[modify] https://crrev.com/5a103d4af878aa956d0818317ef74ad146109176/chromeos/components/nearby/BUILD.gn
[modify] https://crrev.com/5a103d4af878aa956d0818317ef74ad146109176/chromeos/components/nearby/library/BUILD.gn
[add] https://crrev.com/5a103d4af878aa956d0818317ef74ad146109176/chromeos/components/nearby/library/system_clock.h
[add] https://crrev.com/5a103d4af878aa956d0818317ef74ad146109176/chromeos/components/nearby/system_clock_impl.cc
[add] https://crrev.com/5a103d4af878aa956d0818317ef74ad146109176/chromeos/components/nearby/system_clock_impl.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/477ab86dbea847178fa77c84980be44d840c50d8

commit 477ab86dbea847178fa77c84980be44d840c50d8
Author: Kyle Qian <kyleqian@google.com>
Date: Mon Aug 20 21:21:35 2018

Implement AtomicBoolean and AtomicReference for CrOS Nearby.

This CL includes concrete implementations for the abstract classes
AtomicBoolean and AtomicReference defined in the Nearby library. An
AtomicBoolean is a boolean value that may be updated atomically, and an
AtomicReference is an object reference that may be updated atomically.

Because the actual Nearby library has yet to be merged into the CrOS
directory, this CL includes stand-in Nearby abstract classes under
the temporary directory //chromeos/components/nearby/library.
This directory will be removed after the Nearby library gets imported
to //third_party (in-progress CL:
https://chromium-review.googlesource.com/c/chromium/src/+/1113198).

Bug: 861813
Change-Id: Ibbda1bd35e3fb63eed0ae492ecebb3d61fa43050
Reviewed-on: https://chromium-review.googlesource.com/1142478
Commit-Queue: Kyle Qian <kyleqian@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Ryan Hansberry <hansberry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584564}
[modify] https://crrev.com/477ab86dbea847178fa77c84980be44d840c50d8/chromeos/components/nearby/BUILD.gn
[add] https://crrev.com/477ab86dbea847178fa77c84980be44d840c50d8/chromeos/components/nearby/atomic_boolean_impl.cc
[add] https://crrev.com/477ab86dbea847178fa77c84980be44d840c50d8/chromeos/components/nearby/atomic_boolean_impl.h
[add] https://crrev.com/477ab86dbea847178fa77c84980be44d840c50d8/chromeos/components/nearby/atomic_boolean_impl_unittests.cc
[add] https://crrev.com/477ab86dbea847178fa77c84980be44d840c50d8/chromeos/components/nearby/atomic_reference_impl.h
[add] https://crrev.com/477ab86dbea847178fa77c84980be44d840c50d8/chromeos/components/nearby/atomic_reference_impl_unittests.cc
[modify] https://crrev.com/477ab86dbea847178fa77c84980be44d840c50d8/chromeos/components/nearby/library/BUILD.gn
[add] https://crrev.com/477ab86dbea847178fa77c84980be44d840c50d8/chromeos/components/nearby/library/atomic_boolean.h
[add] https://crrev.com/477ab86dbea847178fa77c84980be44d840c50d8/chromeos/components/nearby/library/atomic_reference.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a01e930247040faae5e3dd12e7a84d30230021a7

commit a01e930247040faae5e3dd12e7a84d30230021a7
Author: Kyle Qian <kyleqian@google.com>
Date: Sat Aug 25 00:07:42 2018

Implement Lock and ConditionVariable for CrOS Nearby.

This CL includes a concrete implementation for the abstract classes
Lock (which must be recursive) and ConditionVariable defined in the
Nearby library.

A related CL was previously abandoned
(https://chromium-review.googlesource.com/c/chromium/src/+/1138871)
because the Nearby C++ library already includes a DefaultLock and
DefaultConditionVariable. However, that CL is being revived as this CL
because a Chromium-specific Lock/CV implementation is required. For
instance, Chromium requires a ScopedBlockingCall to be instantiated in
scopes where blocking calls are made. DefaultConditionVariable does not
include an instantiation of ScopedBlockingCall. This implementation of
ConditionVariable uses a base::WaitableEvent, which instantiates a
ScopedBlockingCall. This CL also includes a Lock implementation that is
recursive, which is a requirement of Nearby, but is not originally
supported by base::Lock.

Because the actual Nearby library has yet to be merged into the CrOS
directory, this CL includes stand-in Nearby abstract classes under
the temporary directory //chromeos/components/nearby/library.
This directory will be removed after the Nearby library gets imported
to //third_party.

Bug: 861813
Change-Id: I72660ed302e239d8f38a21728fc715b000057c13
Reviewed-on: https://chromium-review.googlesource.com/1145730
Commit-Queue: Kyle Qian <kyleqian@google.com>
Reviewed-by: François Doray <fdoray@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586070}
[modify] https://crrev.com/a01e930247040faae5e3dd12e7a84d30230021a7/chromeos/components/nearby/BUILD.gn
[add] https://crrev.com/a01e930247040faae5e3dd12e7a84d30230021a7/chromeos/components/nearby/condition_variable_impl.cc
[add] https://crrev.com/a01e930247040faae5e3dd12e7a84d30230021a7/chromeos/components/nearby/condition_variable_impl.h
[add] https://crrev.com/a01e930247040faae5e3dd12e7a84d30230021a7/chromeos/components/nearby/condition_variable_impl_unittest.cc
[modify] https://crrev.com/a01e930247040faae5e3dd12e7a84d30230021a7/chromeos/components/nearby/library/BUILD.gn
[add] https://crrev.com/a01e930247040faae5e3dd12e7a84d30230021a7/chromeos/components/nearby/library/condition_variable.h
[add] https://crrev.com/a01e930247040faae5e3dd12e7a84d30230021a7/chromeos/components/nearby/library/lock.h
[add] https://crrev.com/a01e930247040faae5e3dd12e7a84d30230021a7/chromeos/components/nearby/lock_base.h
[add] https://crrev.com/a01e930247040faae5e3dd12e7a84d30230021a7/chromeos/components/nearby/lock_impl.cc
[add] https://crrev.com/a01e930247040faae5e3dd12e7a84d30230021a7/chromeos/components/nearby/lock_impl.h
[add] https://crrev.com/a01e930247040faae5e3dd12e7a84d30230021a7/chromeos/components/nearby/lock_impl_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3

commit b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3
Author: Kyle Qian <kyleqian@google.com>
Date: Sat Aug 25 00:20:43 2018

Implement {Scheduled,MultiThread,SingleThread}Executor for CrOS Nearby.

This CL includes concrete implementations for the abstract Executor
classes defined in the Nearby library. A ScheduledExecutor allows
scheduled tasks that asynchronously execute in the future. A
MultiThreadExecutor allows tasks with or without return values to be
asynchronously executed in parallel, and a SingleThreadExecutor allows
tasks with or without return values to be executed asynchronously, but
in sequence relative to each other.

Because the actual Nearby library has yet to be merged into the CrOS
directory, this CL includes stand-in Nearby abstract classes under
the temporary directory //chromeos/components/nearby/library.
This directory will be removed after the Nearby library gets imported
to //third_party.

Bug: 861813
Change-Id: Idc561f2cedea7360eaf6d74940e1be8e56efe7cb
Reviewed-on: https://chromium-review.googlesource.com/1154134
Commit-Queue: Kyle Qian <kyleqian@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Ryan Hansberry <hansberry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586075}
[modify] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/BUILD.gn
[modify] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/library/BUILD.gn
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/library/callable.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/library/cancelable.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/library/config.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/library/down_cast.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/library/executor.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/library/multi_thread_executor.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/library/runnable.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/library/scheduled_executor.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/library/single_thread_executor.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/library/submittable_executor.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/multi_thread_executor_impl.cc
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/multi_thread_executor_impl.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/scheduled_executor_impl.cc
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/scheduled_executor_impl.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/scheduled_executor_impl_unittest.cc
[modify] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/settable_future_impl.h
[modify] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/settable_future_impl_unittest.cc
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/single_thread_executor_impl.cc
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/single_thread_executor_impl.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/submittable_executor_base.cc
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/submittable_executor_base.h
[add] https://crrev.com/b8c7e5df06a5ef4f43874f92f715900eaaa5f8c3/chromeos/components/nearby/submittable_executor_base_unittest.cc