[chromium] Wire windows scrollByPage enum up to compositor thread input handling
https://bugs.webkit.org/show_bug.cgi?id=113117

Reviewed by Adrienne Walker.

Source/Platform:

* chromium/public/WebInputHandlerClient.h:

Source/WebKit/chromium:

* src/WebCompositorInputHandlerImpl.cpp:
(WebKit::WebCompositorInputHandlerImpl::handleInputEventInternal):
* tests/WebCompositorInputHandlerImplTest.cpp:
(MockWebInputHandlerClient):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146736 268f45cc-cd09-0410-ab3c-d52691b4dbfc