Since the UI uses multi-touch for zooming, the event is passed to webkit
only when the webpage doesn't allow zooming.
1. Updated the data structure TouchEventData in WebViewCore.java
to take multiple points and used it everywhere.
2. Added a passMultiTouchToWebkit() function to do what its name means.
3. Added the multi-point touch support to dumprendertree.
Change-Id: Iafc1aa7b21a587ad26efd2f124b9a66316297ab8
As part of this, make it possible for DRT to configure the timeout threshold between sending touch events to WebCore as the Layout Tests only synthesize single events, not a stream. Because of this, they often get dropped by the WebView for coming too quickly.
Skip the multi touch test as we don't support multi touch in the Browser.
Change-Id: I7b9830f43181fea33206825b49ef2e294269b4dd