Try re-enabling PNaCl translation cache tests on Dr. Memory bots

The tests have been scaled down and will hopefully not time out.

R=jvoung@chromium.org
BUG=248373

Review URL: https://codereview.chromium.org/24323014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226071 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226071
Add missing test for autotestPrivate.lockScreen

BUG=233834
TEST=browser test

Review URL: https://codereview.chromium.org/25108011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226072 0039d316-1c4b-4281-b951-d872f2087c98
Set the category tag to performance for feedback reports that contain tracing data

BUG=299014

Review URL: https://codereview.chromium.org/25116003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226073 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226073