Event target rects on the top level document shouldn't be clipped.
https://bugs.webkit.org/show_bug.cgi?id=107339

Reviewed by James Robinson.

Source/WebCore:

clippedOverflowRectForRepaint clips the top-level RenderView to the viewport, which
is wrong for generating event target rects, as the result will not extend to the bounds
of the document on pages that scroll. Changing the top-level view to use documentRect
instead.

Tests updated to cover bug: platform/chromium/fast/events/touch/touch-hit-rects-in-iframe.html
                            platform/chromium/fast/events/touch/compositor-touch-hit-rects.html

* page/scrolling/ScrollingCoordinator.cpp:
(WebCore::accumulateRendererTouchEventTargetRects): Use converToRootView instead of
a loop around convertToContaining view. This is not a change in behavior.
(WebCore::accumulateDocumentEventTargetRects): Switch to use documentRect instead of
clippedOverflowRectForRepaint for the top-level Document, and use converToRootView
to put rects in the coordinates of the top-level document.

LayoutTests:

Updating existing tests to cover this issue.

* platform/chromium-linux/platform/chromium/fast/events/touch/compositor-touch-hit-rects-expected.txt:
* platform/chromium/fast/events/touch/compositor-touch-hit-rects.html:
* platform/chromium/fast/events/touch/touch-hit-rects-in-iframe-expected.txt:
* platform/chromium/fast/events/touch/touch-hit-rects-in-iframe.html:
* platform/chromium/fast/events/touch/resources/frame-with-document-touch-handler.html: Added.
* platform/chromium/TestExpectations:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140370 268f45cc-cd09-0410-ab3c-d52691b4dbfc