https://bugs.webkit.org/show_bug.cgi?id=94182

Patch by Tien-Ren Chen <trchen@chromium.org> on 2012-08-29
Reviewed by Adam Barth.

In this new implementation, we add a new WebViewClient::handleDisambiguationPopup delegate.
The disambiguation sequence will be initiated by the gesture event handler
in WebViewImpl if an ambiguous tap is detected, then
m_client->handleDisambiguationPopup will be called, so the embedder can
decide whether to swallow the touch event and show a popup.

New test: WebFrameTest.DisambiguationPopupTest

* WebKit.gyp:
* features.gypi:
* public/WebInputEvent.h:
(WebGestureEvent):
(WebKit::WebGestureEvent::WebGestureEvent):
* public/WebTouchCandidatesInfo.h: Removed.
* public/WebView.h:
(WebKit):
* public/WebViewClient.h:
(WebKit):
(WebViewClient):
(WebKit::WebViewClient::triggersLinkPreview):
* src/WebInputEvent.cpp:
(SameSizeAsWebGestureEvent):
* src/WebViewImpl.cpp:
(WebKit):
(WebKit::WebViewImpl::handleGestureEventWithLinkPreview):
(WebKit::WebViewImpl::handleGestureEvent):
* src/WebViewImpl.h:
(WebViewImpl):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@127095 268f45cc-cd09-0410-ab3c-d52691b4dbfc