Also in interactive_ui_tests:
  - CrossSiteSubframe/DragAndDropBrowserTest.CrossSiteDrag/0
  - CrossSiteSubframe/DragAndDropBrowserTest.DragImageBetweenFrames/0
  - CrossSiteSubframe/DragAndDropBrowserTest.DragImageFromDisappearingFrame/0
  - CrossSiteSubframe/DragAndDropBrowserTest.DragStartInFrame/0
  - CrossSiteSubframe/DragAndDropBrowserTest.DropTextFromOutside/0
  - SameSiteSubframe/DragAndDropBrowserTest.CrossSiteDrag/0
  - SitePerProcessInteractiveBrowserTest.TabAndMouseFocusNavigation

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/54c0b8052525055df08be869503f645168d203ba

commit 54c0b8052525055df08be869503f645168d203ba
Author: jonross <jonross@chromium.org>
Date: Wed May 30 15:36:40 2018

Update How WebViewTest.ReloadAfterCrash waits for frames

WebViewTest.ReloadAfterCrash wants to wait for frames to have been produced, but
is not interested in hit test data.

It has been using WaitForChildFrameSurfaceReady which does not work with
VizDisplayCompositor.

This updates it to using RenderFrameSubmissionObserver which works with both
classic compositing and Viz.

TEST=WebViewTest.ReloadAfterCrash

Bug:  787945 
Change-Id: I1358b0780964cff0298f6e8851dd629bbd14dc44
Reviewed-on: https://chromium-review.googlesource.com/1076778
Reviewed-by: Fady Samuel <fsamuel@chromium.org>
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562837}
[modify] https://crrev.com/54c0b8052525055df08be869503f645168d203ba/chrome/browser/apps/guest_view/web_view_browsertest.cc
[modify] https://crrev.com/54c0b8052525055df08be869503f645168d203ba/testing/buildbot/filters/viz.browser_tests.filter

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0a8c7da771970b12e2453be33cf0df6a83d369d7

commit 0a8c7da771970b12e2453be33cf0df6a83d369d7
Author: Jonathan Ross <jonross@chromium.org>
Date: Wed Jun 13 16:44:50 2018

Update how SitePerProcessMacBrowserTest waits for hit test data

Currently SitePerProcessMacBrowserTest.InputEventRouterTouchpadGestureTargetTest
 does not work on Viz. This change updates it to use the new hit test data api.

TEST: SitePerProcessMacBrowserTest.InputEventRouterTouchpadGestureTargetTest
Bug:  787945 
Change-Id: I5aec8787ca1cf73e04aa8801b8d6af53d471c601
Reviewed-on: https://chromium-review.googlesource.com/1099044
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566865}
[modify] https://crrev.com/0a8c7da771970b12e2453be33cf0df6a83d369d7/content/browser/site_per_process_mac_browsertest.mm
[modify] https://crrev.com/0a8c7da771970b12e2453be33cf0df6a83d369d7/testing/buildbot/filters/viz.content_browsertests.filter

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7de3aa5875c6e5e59c6d761be41ad9e05b60645b

commit 7de3aa5875c6e5e59c6d761be41ad9e05b60645b
Author: jonross <jonross@chromium.org>
Date: Mon Jun 18 17:33:43 2018

Update TouchAccessibilityBrowserTest hit test waiting

Currently TouchAccessibilityBrowserTest.TouchExplorationInCrossSiteIframe is
calling WaitForChildFrameSurfaceReady. However it is not actually waiting, as
the frame it is providing is not a RenderWidgetHostViewChildFrame.

This change updates the call to the new hit testing api HitTestRegionObserver.
This will allow the test to properly wait on hit testing data while run under
Viz. While maintaining the current early exit for non-Viz.

TEST=TouchAccessibilityBrowserTest.TouchExplorationInCrossSiteIframe

Bug:  787945 
Change-Id: Ica7fa92e7dcb5ea3d7a5b9702f9c5d077d929c07
Reviewed-on: https://chromium-review.googlesource.com/1102570
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568054}
[modify] https://crrev.com/7de3aa5875c6e5e59c6d761be41ad9e05b60645b/content/browser/accessibility/touch_accessibility_aura_browsertest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/dff175993a76918ff962e8165b48202ef7b6d361

commit dff175993a76918ff962e8165b48202ef7b6d361
Author: jonross <jonross@chromium.org>
Date: Mon Jun 18 17:38:08 2018

Update Android SitePerProcessHitTest to new Hit Test Api

I missed a few callsites to WaitForChildFrameSurfaceReady which were in Android tests.
This change updates them to use the new HitTestRegionObserver

TEST=TouchSelectionControllerClientAndroidSiteIsolationTest.BasicSelectionIsolatedIframe
SitePerProcessHitTestBrowserTest.CrossProcessTooltipTestAndroid

Bug:  787945 
Change-Id: I0abfa8e4c036552ac416909b15398a53a71ee064
Reviewed-on: https://chromium-review.googlesource.com/1102829
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568059}
[modify] https://crrev.com/dff175993a76918ff962e8165b48202ef7b6d361/content/browser/site_per_process_browsertest.cc
[modify] https://crrev.com/dff175993a76918ff962e8165b48202ef7b6d361/content/browser/site_per_process_hit_test_browsertest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/03870c0449c4bb48103a147a84eb42e99ef5f482

commit 03870c0449c4bb48103a147a84eb42e99ef5f482
Author: jonross <jonross@chromium.org>
Date: Wed Jun 20 18:12:29 2018

Remove legacy WaitForChildFrameSurfaceReady from browser_test_utils

HitTestRegionObserver was created to replace WaitForChildFrameSurfaceReady.
However until the new hit testing api is on by default, it is needed for testing
the legacy path.

By now all callsites to it have been changed to HitTestRegionObserver. So this
change removes it from browser_test_utils, and hides it inside of
HitTestRegionObserver to prevent new callsites from being added. I'll delete it
once and for all once the new hit testing api is on by default.

TBR=piman@chromium.org
TEST=content_browsertests, browser_tests, interactive_ui_tests

Bug:  787945 
Change-Id: I9db70ef06bd327f95db39ab5174df49db538eea4
Reviewed-on: https://chromium-review.googlesource.com/1106048
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568928}
[modify] https://crrev.com/03870c0449c4bb48103a147a84eb42e99ef5f482/content/public/test/browser_test_utils.cc
[modify] https://crrev.com/03870c0449c4bb48103a147a84eb42e99ef5f482/content/public/test/browser_test_utils.h
[modify] https://crrev.com/03870c0449c4bb48103a147a84eb42e99ef5f482/content/public/test/hit_test_region_observer.cc
[modify] https://crrev.com/03870c0449c4bb48103a147a84eb42e99ef5f482/content/public/test/hit_test_region_observer.h