Remove TouchEvent interface, and rename TouchEventImpl to TouchEvent.

BUG=125937

Review URL: https://chromiumcodereview.appspot.com/10831240

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150918 0039d316-1c4b-4281-b951-d872f2087c98
84 files changed