Clarify the size of a document view (a.k.a layout size) that causes FrameView to emit the resize ev…

Source/core/platform/ScrollView.cpp

Index: Source/core/platform/ScrollView.cpp
diff --git a/Source/core/platform/ScrollView.cpp b/Source/core/platform/ScrollView.cpp
index 2347bfda5e1f35449ae8be5b15cbde0643e95303..c5107d6205c7bfb903352c13a0912f9763396af7 100644
--- a/Source/core/platform/ScrollView.cpp
+++ b/Source/core/platform/ScrollView.cpp
@@ -214,7 +214,11 @@ IntRect ScrollView::visibleContentRect(VisibleContentRectIncludesScrollbars scol
 
 IntSize ScrollView::layoutSize(VisibleContentRectIncludesScrollbars scrollbarInclusion) const
 {
-    return m_fixedLayoutSize.isEmpty() || !m_useFixedLayout ? unscaledVisibleContentSize(scrollbarInclusion) : m_fixedLayoutSize;
+    if (m_useFixedLayout) {
+        ASSERT(!m_fixedLayoutSize.isEmpty());

[aelias_OOO_until_Jul13, 2013/05/29 18:47:28]

This subtly changes the behavior in a way that might cause a regression (size
initialization is quite timing-sensitive) and I don't think it's needed to solve
the bug  so I suggest not touching this?

+        return m_fixedLayoutSize;
+    }
+    return unscaledVisibleContentSize(scrollbarInclusion);
 }
 
 IntSize ScrollView::fixedLayoutSize() const