Mark virtual inspector tests as slow, animation-matrix-negative-scale-unmatrix.html as flaky.

TBR=dglazkov@chromium.org
BUG=

Review URL: https://codereview.chromium.org/149513012

git-svn-id: svn://svn.chromium.org/blink/trunk@166117 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert of Retry "Replace RenderFullScreen with top layer" (https://codereview.chromium.org/142653003/)

Reason for revert:
Flaky crashes on full-screen-element-stack.html
http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux/builds/26189

This test also crashed after the last attempt, but it looked like it was not due to this patch since it kept crashing well after that patch was reverted. It looks real now though.

Original issue's description:
> Retry "Replace RenderFullScreen with top layer"
> 
> This patch makes the Fullscreen API use the top layer, as per the latest
> Fullscreen spec. This retry fixes some tests/expectations.
> 
> Previously landed as r165904 and r165710
> Codereviews:
> https://codereview.chromium.org/134753003/
> https://codereview.chromium.org/139743005/
> 
> BUG=240576, 246077
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=166114

TBR=rbyers@chromium.org,esprehn@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=240576, 246077

Review URL: https://codereview.chromium.org/134133004

git-svn-id: svn://svn.chromium.org/blink/trunk@166118 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Make use flex in heap snapshot view

R=yurys@chromium.org

Review URL: https://codereview.chromium.org/130803010

git-svn-id: svn://svn.chromium.org/blink/trunk@166119 bbb929c8-8fbe-4397-9dbb-9b2b20218538
IRC commit-bot: Make svn revision appear in the beginning of bot message.

It is easier to read the svn version quickly if it appears in the beginning of the message.

R=alancutter, dstockwell

Review URL: https://codereview.chromium.org/145103003

git-svn-id: svn://svn.chromium.org/blink/trunk@166120 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add histograms to ResourceFetcher to evaluate memory cache hit rate

This is a rework of https://chromiumcodereview.appspot.com/23734006 that was
reverted due to a regression in PLT. This patch introduces three histograms
that measures the count of dead resources used from cache, revalidated, or
loaded again. This will drive possible improvements that could be made to the
cache to  decrease memory usage on Android.

BUG=290193

Review URL: https://codereview.chromium.org/148323002

git-svn-id: svn://svn.chromium.org/blink/trunk@166121 bbb929c8-8fbe-4397-9dbb-9b2b20218538