Quota: Cap size of requested quota

This change caps size of requested quota as follows:
- Temporary quota is capped at the maximum value of int64
(This is an implementation limitation)
- Persistent quota is capped at 10GB per host


BUG=256288
TEST=content_unittests
NOTRY=true

Review URL: https://codereview.chromium.org/150903003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249326 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249326
Add PowerSaveBlocker in ContentVideoView

This patch add additonal PowerSaveBlocker in ContentVideoView, and will block
screen sleep when ContentView's container isn't visiable.

BUG=338873

Review URL: https://codereview.chromium.org/141553010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249327 0039d316-1c4b-4281-b951-d872f2087c98
Loads the logo image to the speech UI in app-list.

BUG=313904
R=xiyuan@chromium.org, oshima@chromium.org
TEST=manually

Review URL: https://codereview.chromium.org/146643004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249328 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249328