cc: Stop needlessly converting rect/rectf in update tile priorities

This patch ensures that view_rect is rectf to begin with, since
all of the places in that file that use it convert it to rectf
implicitly

BUG=326991
R=danakj

Review URL: https://codereview.chromium.org/106763006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240840 0039d316-1c4b-4281-b951-d872f2087c98
Made first-run UI more accessibility-friendly.

* Made possible to enable spoken feedback for WebUI.
* OverlayEventFilter changed to pass event through normal flow (instead of
  managing them by itself).
* Tray bubble launched inactive to keep focus in WebUI.
* Other improvements.

BUG=269295

Review URL: https://codereview.chromium.org/107523007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240841 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240840
[Telemetry] Add a benchmark for memory.mobile_memory.

The bots are trying to run it, but the benchmark was never implemented.

BUG=299828
NOTRY=True
TBR=dtu@chromium.org

Review URL: https://codereview.chromium.org/115623002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240842 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240842
[Telemetry] Disable media_mse on linux and android.

It is failing on android.

TBR=shadi@chromium.org
NOTRY=True
BUG=

Review URL: https://codereview.chromium.org/115703002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240843 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240843