[chromium] Allow WebGestureEvent to store four floating point values

[chromium] Allow WebGestureEvent to store four floating point values
https://bugs.webkit.org/show_bug.cgi?id=84053

Patch by Terry Anderson <tdanderson@chromium.org> on 2012-04-16
Reviewed by Darin Fisher.

See bug description for an explanation of the changes made.

Source/WebCore:

* platform/PlatformGestureEvent.h:
(WebCore::PlatformGestureEvent::PlatformGestureEvent):
(PlatformGestureEvent):
(WebCore::PlatformGestureEvent::gammaX):
(WebCore::PlatformGestureEvent::gammaY):

Source/WebKit/chromium:

* public/WebInputEvent.h:
(WebGestureEvent):
(WebKit::WebGestureEvent::WebGestureEvent):
* src/WebInputEvent.cpp:
(SameSizeAsWebGestureEvent):
* src/WebInputEventConversion.cpp:
(WebKit::PlatformGestureEventBuilder::PlatformGestureEventBuilder):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@114301 268f45cc-cd09-0410-ab3c-d52691b4dbfc