https://bugs.webkit.org/show_bug.cgi?id=76220

Reviewed by Simon Fraser.

* page/FrameView.cpp:
Remove PLATFORM(CHROMIUM) #ifdefs.

* page/FrameView.h:
Ditto.

* platform/ScrollView.cpp:
(WebCore::ScrollView::wheelEvent):
Ditto.

* platform/ScrollableArea.h:
Ditto.

* rendering/RenderLayerCompositor.cpp:
(WebCore::RenderLayerCompositor::frameViewDidChangeSize):
Ditto.

(WebCore::RenderLayerCompositor::requiresOverhangAreasLayer):
Make this return true if we have a scrolling coordinator.

(WebCore::RenderLayerCompositor::updateOverflowControlsLayers):
Remove PLATFORM(CHROMIUM) #ifdefs. Fix a bug the overhang layer was being added above the clip layer.

(WebCore::RenderLayerCompositor::destroyRootLayer):
Remove PLATFORM(CHROMIUM) #ifdefs.

* rendering/RenderLayerCompositor.h:
Ditto.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@104879 268f45cc-cd09-0410-ab3c-d52691b4dbfc