Fix test for previous frame in JniFrameConsumer::ApplyBuffer()

Previously the test was always failing, which meant that ApplyBuffer()
always treated the passed-in buffer as the current one, and always asked
the FrameProducer to draw into it, instead of freeing it. Eventually,
the app would run out of memory.

BUG=325590

Review URL: https://codereview.chromium.org/116873004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241484 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241484
Adds PRESUBMIT.py check to look for unprefixed string16.

R=maruel@chromium.org
BUG=329295
TEST=PRESUBMIT_test.py
NOTRY=true

Review URL: https://codereview.chromium.org/98143005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241485 0039d316-1c4b-4281-b951-d872f2087c98
Remove GetDefaultProfile from component_loader.

TEST=none
BUG=322682

Review URL: https://codereview.chromium.org/113303003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241486 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241486