https://bugs.webkit.org/show_bug.cgi?id=99947

Reviewed by Adam Barth.

Source/WebCore:

Currently a long-press gesture is used to dispatch a context menu (for platforms
defining CONTEXT_MENUS) or to select text (for Android). Additionally, for platforms
defining TOUCH_ADJUSTMENT, gesture target fuzzing is performed on the location and
touch area of the long-press gesture.

This CL will cause two-finger tap gestures to be handled in the same way as long-press
gestures. The location and touch area of a two-finger tap gesture will correspond to
the location and touch area of the first finger down; the location/area of the second
finger will be ignored.

Test: touchadjustment/touch-links-two-finger-tap.html

* page/EventHandler.cpp:
(WebCore::EventHandler::handleGestureLongPress):
(WebCore):
(WebCore::EventHandler::handleGestureForTextSelectionOrContextMenu):
(WebCore::EventHandler::handleGestureTwoFingerTap):
(WebCore::EventHandler::adjustGesturePosition):
* page/EventHandler.h:
(EventHandler):

Source/WebKit/chromium:

Set the area of a two-finger tap gesture to be the area of the enclosing
rectangle for the first finger down.

* src/WebInputEventConversion.cpp:
(WebKit::PlatformGestureEventBuilder::PlatformGestureEventBuilder):

LayoutTests:

New layout test for dispatching context menus on a two-finger tap
gesture when touch adjustment is enabled.

* touchadjustment/touch-links-two-finger-tap-expected.txt: Added.
* touchadjustment/touch-links-two-finger-tap.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@132406 268f45cc-cd09-0410-ab3c-d52691b4dbfc