Fix for the multiple shift-chording edge cases we were discussing offline.
Specifically:
1. Start chording with shift key, slide finger off shift key
2. While chording with one shift key, press another shift key
3. Place a finger on the screen before chording with shift key, remove finger
and then end chording.
BUG=297586

Review URL: https://codereview.chromium.org/25158002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226299 0039d316-1c4b-4281-b951-d872f2087c98
Rename speech test methods to *ForTesting instead of *ForTests.

This allows these methods to be checked by the "*ForTesting" hook in the
presubmit checks.

BUG=301679

Review URL: https://codereview.chromium.org/25276002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226300 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226300