The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/eeed7dfe9a57495020586b071c56dec3590f83fb

commit eeed7dfe9a57495020586b071c56dec3590f83fb
Author: Mustaq Ahmed <mustaq@google.com>
Date: Tue Mar 27 20:16:52 2018

Make activation notification to other processes unconditional

We originally had the notification conditional on whether the current
frame had been activated before or not.  This works fine for the sticky
activation bit but for the transient bit (which can expire or get
consumed), other processes should be notified at every user activation.

Bug:  780556 ,  775930 
Change-Id: I902129651504371bad0b9ab841e65b223bee46b4
Reviewed-on: https://chromium-review.googlesource.com/973507
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Commit-Queue: Mustaq Ahmed <mustaq@chromium.org>
Cr-Commit-Position: refs/heads/master@{#546229}
[modify] https://crrev.com/eeed7dfe9a57495020586b071c56dec3590f83fb/third_party/WebKit/Source/core/exported/LocalFrameClientImpl.cpp
[modify] https://crrev.com/eeed7dfe9a57495020586b071c56dec3590f83fb/third_party/WebKit/Source/core/exported/LocalFrameClientImpl.h
[modify] https://crrev.com/eeed7dfe9a57495020586b071c56dec3590f83fb/third_party/WebKit/Source/core/frame/Frame.cpp
[modify] https://crrev.com/eeed7dfe9a57495020586b071c56dec3590f83fb/third_party/WebKit/Source/core/frame/LocalFrameClient.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c4cb716e319efaa1c2582565c5f18965dfa39366

commit c4cb716e319efaa1c2582565c5f18965dfa39366
Author: Mustaq Ahmed <mustaq@google.com>
Date: Tue Jun 05 16:28:36 2018

Add browser-side activation state with sync across OOPIFs.

In this CL we added replicated activation state in the
browser process, and fixed propagation in the frame trees
across all renderer processes.  We substituted
the IPCs Frame*Msg_SetHasReceivedUserGesture (used for
notifying activation only) with ones that communicate both
notification & consumption of user activations.

- Lack of browser-side activation states made it
impossible to avoid race conditions with cross-process
postMessages.  All ChromeSitePerProcessTests now pass with
UAv2 (including one that was disabled before).

- Previously, Frame::NotifyUserActivation didn't propagate
the notification across renderers after the first
activation, making the transient bit unavailable after the
first successful consumption during the frame's lifetime.

- Frame::ConsumeTransientUserActivation was incomplete for
OOPIFs, didn't update RemoteFrames in other renderers.
Also fixed a bug (not consuming across the frame tree)
that can be exploited to consume multiple times from
different frames.

Design doc:
https://docs.google.com/document/d/1XL3vCedkqL65ueaGVD-kfB5RnnrnTaxLc7kmU91oerg

Bug:  780556 ,  775930 
Change-Id: I3ea0f5f9d314f6a8bfd88b3bcf8c12700c560cc7
Reviewed-on: https://chromium-review.googlesource.com/967260
Commit-Queue: Mustaq Ahmed <mustaq@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#564530}
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/chrome/browser/chrome_site_per_process_browsertest.cc
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/browser/frame_host/frame_tree_node.cc
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/browser/frame_host/frame_tree_node.h
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/browser/frame_host/render_frame_host_impl.cc
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/browser/frame_host/render_frame_host_impl.h
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/browser/frame_host/render_frame_host_manager.cc
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/browser/frame_host/render_frame_host_manager.h
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/browser/web_contents/web_contents_impl.cc
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/common/frame.mojom
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/common/frame_messages.h
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/renderer/render_frame_impl.cc
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/renderer/render_frame_impl.h
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/renderer/render_frame_proxy.cc
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/renderer/render_frame_proxy.h
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/content/renderer/render_view_impl.cc
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/common/BUILD.gn
[rename] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/common/frame/user_activation_state.cc
[add] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/common/frame/user_activation_state_unittest.cc
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/public/common/BUILD.gn
[add] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/public/common/frame/user_activation_state.h
[add] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/public/common/frame/user_activation_update_type.h
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/public/web/web_local_frame_client.h
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/public/web/web_remote_frame.h
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/renderer/core/exported/local_frame_client_impl.cc
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/renderer/core/exported/local_frame_client_impl.h
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/renderer/core/exported/web_remote_frame_impl.cc
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/renderer/core/exported/web_remote_frame_impl.h
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/renderer/core/frame/BUILD.gn
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/renderer/core/frame/frame.cc
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/renderer/core/frame/frame.h
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/renderer/core/frame/frame_test.cc
[modify] https://crrev.com/c4cb716e319efaa1c2582565c5f18965dfa39366/third_party/blink/renderer/core/frame/local_frame_client.h
[delete] https://crrev.com/0ae4e766b88f7359be42bc796b9fab36369ab28f/third_party/blink/renderer/core/frame/user_activation_state.h