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This add gesture related functionality to the java side to ContentViewCore and also
adds some missing calls on the routing path of the gesture events to webkit. The WebKit side
for related parts of the WebCompositorInputHandler has already been upstreamed.

BUG=136680
TEST=

Review URL: https://chromiumcodereview.appspot.com/10790066

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148861 0039d316-1c4b-4281-b951-d872f2087c98