If WebCore doesn't response touch down in time, don't block the UI tap, pan and double tap. Added a time out (which is same as shortpress time out, 200ms) for how long we wait for WebCore's response for touch down.
If WebCore doesn't response touch down in time, don't
block the UI tap, pan and double tap. Added a time out
(which is same as shortpress time out, 200ms) for how
long we wait for WebCore's response for touch down.

This should fix the problem where pan/touch is not working
all the time when Flash plugin is installed.

Fix http://b/issue?id=2144761

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base