Remove acknowledge timeout for TouchEnd and TouchCancel events

Waiting acknowledge for TouchEnd and TouchCancel shouldn't affect
responsiveness for scroll and pinch gestures. If we timeout TouchEnd
events, it can end up being processed by both user JavaScript and
gesture detector, causing double handling.

BUG=248090
R=tedchoc@chromium.org

Review URL: https://chromiumcodereview.appspot.com/16963007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@208063 0039d316-1c4b-4281-b951-d872f2087c98

content/public/android/java/src/org/chromium/content/browser/ContentViewGestureHandler.java

@@ -793,7 +793,10 @@ class ContentViewGestureHandler implements LongPressDelegate {
             mTouchCancelEventSent = false;
 
             if (mMotionEventDelegate.sendTouchEvent(event.getEventTime(), type, pts)) {
-                mTouchEventTimeoutHandler.start(event.getEventTime(), pts);
+                if (event.getAction() != MotionEvent.ACTION_UP
+                        && event.getAction() != MotionEvent.ACTION_CANCEL) {
+                    mTouchEventTimeoutHandler.start(event.getEventTime(), pts);
+                }
                 return EVENT_FORWARDED_TO_NATIVE;
             }
         } else if (!mTouchCancelEventSent) {