Converting WaitForChildFrameSurfaceReady to RenderFrameSubmissionObserver

There are a few sites in site_pre_process_browsertest which use WaitForChildFrameSurfaceReady to simply wait a frame. This updates those calls to use RenderFrameSubmissionObserver.

There are a few others, however the rest of those tests also need the new hit test api, so I'll convert them later.

SitePerProcessBrowserTest.CompositorViewportPixelSizeTest, SitePerProcessBrowserTest.NavigateCrashedSubframeToSameSite

Bug: 763452
Change-Id: Ic651a67896b6174559bb50299b267237b0cd7b9b
Reviewed-on: https://chromium-review.googlesource.com/1077817
Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: Fady Samuel <fsamuel@chromium.org>
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562912}
4 files changed