This is not idle as in CPU activity but idle as in "is the user generating input activity".

So closer to input than scheduling.

Slipping by at least a milestone; will likely hand off to new owner.

Created a chromestatus feature. LMK If I got some of the fields wrong here (e.g. is category > user input the best one?).

Made @jsbell an owner, so feel free to change as appropriate.

https://www.chromestatus.com/feature/4590256452009984

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c

commit 366a1d932aa48b7d42f6d6f900bfca4a0738fa1c
Author: Sam Goto <goto@chromium.org>
Date: Fri Jan 18 21:47:35 2019

Idle Detection API: Prototype

https://github.com/inexorabletash/idle-detection

Just a webification of the chrome.idle.* APIs.

Does not yet include:

- permission checks
- android integration
- final API

Intent to implement:

https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/OuwzBmH02M4

Design doc:

https://docs.google.com/document/d/1_XlwY3NuG2HwWEYVrR-MNvw_i4hj5ZNj3gKvxWqO0FU/edit

Bug: 878979
Change-Id: Ie45b34d5c29e04dfe65f8ff5127c6be34850d68f
Reviewed-on: https://chromium-review.googlesource.com/c/1351490
Commit-Queue: Sam Goto <goto@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Auto-Submit: Sam Goto <goto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#624304}
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/android_webview/browser/aw_permission_manager.cc
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/chrome/browser/BUILD.gn
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/chrome/browser/idle/OWNERS
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/chrome/browser/idle/idle_detection_permission_context.cc
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/chrome/browser/idle/idle_detection_permission_context.h
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/chrome/browser/permissions/permission_manager.cc
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/chrome/browser/permissions/permission_util.cc
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/chrome/browser/ui/webui/site_settings_helper.cc
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/components/content_settings/core/common/content_settings.cc
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/components/content_settings/core/common/content_settings_types.h
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/browser/BUILD.gn
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/browser/DEPS
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/browser/devtools/protocol/browser_handler.cc
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/browser/idle/OWNERS
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/browser/idle/idle_manager.cc
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/browser/idle/idle_manager.h
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/browser/idle/idle_manager_unittest.cc
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/browser/permissions/permission_service_impl.cc
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/browser/renderer_interface_binders.cc
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/browser/storage_partition_impl.cc
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/browser/storage_partition_impl.h
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/public/app/mojo/content_browser_manifest.json
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/public/browser/permission_type.h
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/shell/browser/shell_permission_manager.cc
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/content/test/BUILD.gn
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/public/BUILD.gn
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/public/platform/modules/idle/OWNERS
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/public/platform/modules/idle/idle_manager.mojom
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/public/platform/modules/permissions/permission.mojom
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/core/inspector/browser_protocol.pdl
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/BUILD.gn
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/event_target_modules_names.json5
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/BUILD.gn
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/DEPS
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/OWNERS
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/idle_manager.cc
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/idle_manager.h
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/idle_manager.idl
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/idle_options.idl
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/idle_status.cc
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/idle_status.h
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/idle_status.idl
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/navigator_idle.cc
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/navigator_idle.h
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/navigator_idle.idl
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/idle/worker_navigator_idle.idl
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/modules_idl_files.gni
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/permissions/permission_descriptor.idl
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/modules/permissions/permissions.cc
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/renderer/platform/runtime_enabled_features.json5
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/web_tests/external/wpt/idle-detection/META.yml
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/web_tests/external/wpt/idle-detection/basics.tentative.https.any.js
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/web_tests/external/wpt/idle-detection/idle-detection.idl
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/web_tests/external/wpt/idle-detection/idlharness.https.any.js
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/web_tests/http/tests/serviceworker/webexposed/global-interface-listing-service-worker-expected.txt
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/web_tests/webexposed/global-interface-listing-dedicated-worker-expected.txt
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/web_tests/webexposed/global-interface-listing-expected.txt
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/third_party/blink/web_tests/webexposed/global-interface-listing-shared-worker-expected.txt
[modify] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/ui/base/BUILD.gn
[add] https://crrev.com/366a1d932aa48b7d42f6d6f900bfca4a0738fa1c/ui/base/idle/idle_android.cc

Kicked off a launch review. Marking this bug blocked on that to make sure it doesn't fall through the cracks.

https://bugs.chromium.org/p/chromium/issues/approval?id=924208

Per process, also kicked off a TAG review:

https://github.com/w3ctag/design-reviews/issues/336