Recompute overflow after transform changes

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index 6a7805cd00d1343c767ccbf8e66c1926ec1c4a85..f420726a33d4f4b2ef73e6f7ecb84d057b5d6a88 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -613,6 +613,18 @@ void FrameView::updateAcceleratedCompositingSettings()
         renderView->compositor()->updateAcceleratedCompositingSettings();
 }
 
+void FrameView::recalcOverflowAfterStyleChange()
+{
+    RenderView* renderView = this->renderView();
+    if (!renderView || !renderView->needsOverflowRecalcAfterStyleChange())

[ojan, 2014/04/19 02:19:30]

Can renderView really ever be null here? We only ever call this as
view()->recalcOverflowAfterStyleChange(). So we should be able to
ASSERT(renderView) here.

[trchen, 2014/04/19 05:08:21]

Sounds good. Will do it.

+        return;
+
+    renderView->recalcOverflowAfterStyleChange();
+
+    // FIXME: We should adjust frame scrollbar here, but that will make many
+    // tests flake in debug build.
+}
+
 void FrameView::updateCompositingLayersAfterStyleChange()
 {
     TRACE_EVENT0("webkit", "FrameView::updateCompositingLayersAfterStyleChange");