Change FrameTree to return Frames instead of LocalFrames.

Source/core/rendering/FastTextAutosizer.cpp

Index: Source/core/rendering/FastTextAutosizer.cpp
diff --git a/Source/core/rendering/FastTextAutosizer.cpp b/Source/core/rendering/FastTextAutosizer.cpp
index 42dd9d945ebf4e49c7ef3665422e88fa5a61f302..d60ff6dbe9e97a31d1fc9d64e658c76fd5f827c4 100644
--- a/Source/core/rendering/FastTextAutosizer.cpp
+++ b/Source/core/rendering/FastTextAutosizer.cpp
@@ -488,8 +488,10 @@ void FastTextAutosizer::updatePageInfoInAllFrames()
 {
     ASSERT(!m_document->frame() || m_document->frame()->isMainFrame());
 
-    for (LocalFrame* frame = m_document->frame(); frame; frame = frame->tree().traverseNext()) {
-        if (FastTextAutosizer* textAutosizer = frame->document()->fastTextAutosizer())
+    for (Frame* frame = m_document->frame(); frame; frame = frame->tree().traverseNext()) {
+        if (!frame->isLocalFrame())
+            continue;
+        if (FastTextAutosizer* textAutosizer = toLocalFrame(frame)->document()->fastTextAutosizer())
             textAutosizer->updatePageInfo();
     }
 }