telemetry: re-enable smoothness.tough_canvas_cases on Android.

The benchmark should work now that https://codereview.chromium.org/51803002
has landed.

R=dtu@chromium.org
BUG=311582

Review URL: https://codereview.chromium.org/51103014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231914 0039d316-1c4b-4281-b951-d872f2087c98
Fix DelegatedFrameResourceCollection thread safety

Don't keep a ref to DelegatedFrameResourceCollection inside the return resources
callback, because it is called from a thread.

BUG=None
R=danakj@chromium.org

Review URL: https://codereview.chromium.org/47703005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231915 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 231914
SVN changes up to revision 231915
Revert 231504 "Make app APIs implicit within _api_features.json ..."

> Make app APIs implicit within _api_features.json not _permission_features.json.
> 
> BUG=310707
> R=yoz@chromium.org
> TBR=achuith@chromium.org
> 
> Review URL: https://codereview.chromium.org/49333004

TBR=kalman@chromium.org

Review URL: https://codereview.chromium.org/50523011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231916 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 231916