Remove code that enables/disables side bezel touch event

The code was originally added to make it easier to experiment
with turning on/off side bezel touch sensor on Pixel. Now
we have decided that turning on side bezel has indeed noise
issue, we will just keep it off and also remove the relevant
filtering code.

BUG=350525
TEST=no functional change since the flag is default off.

Review URL: https://codereview.chromium.org/195403002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256430 0039d316-1c4b-4281-b951-d872f2087c98
gin: Add the concept of named and indexed interceptors.

This will allow for using gin as a drop-in replacement for NPObject.

BUG=347565
R=abarth@chromium.org,dcarney@chromium.org,aa@chromium.org

Review URL: https://codereview.chromium.org/194603003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256431 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256431