The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/bfd6a8144791f47eefb45961819c6f3472035506

commit bfd6a8144791f47eefb45961819c6f3472035506
Author: clamy <clamy@chromium.org>
Date: Mon May 30 16:25:17 2016

PlzNavigate: properly execute BeforeUnload on renderer initiated navigations

This CL ensures that the BeforeUnload event is always properly executed before
starting a renderer-initiated navigation when browser-side-navigation is
enabled.

BUG= 608371 , 475027 
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation

Review-Url: https://codereview.chromium.org/1890493002
Cr-Commit-Position: refs/heads/master@{#396737}

[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/components/test_runner/test_runner_for_specific_view.cc
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/content/browser/frame_host/navigator_impl.cc
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/content/browser/frame_host/render_frame_host_impl.cc
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/content/browser/frame_host/render_frame_host_impl.h
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/content/browser/frame_host/render_frame_host_manager.cc
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/content/browser/frame_host/render_frame_host_manager.h
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/content/browser/frame_host/render_frame_host_manager_unittest.cc
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/content/browser/web_contents/web_contents_impl.cc
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/content/common/frame_messages.h
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/content/renderer/render_frame_impl.cc
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/content/renderer/render_frame_impl.h
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/testing/buildbot/filters/browser-side-navigation.linux.content_browsertests.filter
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/third_party/WebKit/LayoutTests/FlagExpectations/enable-browser-side-navigation
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/third_party/WebKit/Source/core/loader/FrameLoader.cpp
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/third_party/WebKit/Source/web/WebLocalFrameImpl.h
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/third_party/WebKit/Source/web/WebRemoteFrameImpl.h
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/third_party/WebKit/public/web/WebFrame.h
[modify] https://crrev.com/bfd6a8144791f47eefb45961819c6f3472035506/third_party/WebKit/public/web/WebLocalFrame.h