The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d35f8c61ab3d89a4fe0f6de3e641d1748dc5ef09

commit d35f8c61ab3d89a4fe0f6de3e641d1748dc5ef09
Author: mfoltz <mfoltz@chromium.org>
Date: Thu Feb 16 16:56:46 2017

[Presentation API] Adds UseCounters.

This adds UseCounters for secure and insecure contexts when using the Presentation API.  This is in preparation for deprecating the API on insecure contexts.

BUG= 692185 

Review-Url: https://codereview.chromium.org/2692333004
Cr-Commit-Position: refs/heads/master@{#450994}

[modify] https://crrev.com/d35f8c61ab3d89a4fe0f6de3e641d1748dc5ef09/third_party/WebKit/Source/core/frame/UseCounter.h
[modify] https://crrev.com/d35f8c61ab3d89a4fe0f6de3e641d1748dc5ef09/third_party/WebKit/Source/modules/presentation/Presentation.cpp
[modify] https://crrev.com/d35f8c61ab3d89a4fe0f6de3e641d1748dc5ef09/third_party/WebKit/Source/modules/presentation/PresentationReceiver.cpp
[modify] https://crrev.com/d35f8c61ab3d89a4fe0f6de3e641d1748dc5ef09/third_party/WebKit/Source/modules/presentation/PresentationReceiver.h
[modify] https://crrev.com/d35f8c61ab3d89a4fe0f6de3e641d1748dc5ef09/third_party/WebKit/Source/modules/presentation/PresentationRequest.cpp
[modify] https://crrev.com/d35f8c61ab3d89a4fe0f6de3e641d1748dc5ef09/third_party/WebKit/Source/modules/presentation/PresentationRequest.h
[modify] https://crrev.com/d35f8c61ab3d89a4fe0f6de3e641d1748dc5ef09/tools/metrics/histograms/histograms.xml