Remove frame flattening from rendering code.

Source/core/rendering/TextAutosizer.cpp

Index: Source/core/rendering/TextAutosizer.cpp
diff --git a/Source/core/rendering/TextAutosizer.cpp b/Source/core/rendering/TextAutosizer.cpp
index 953f9bd44e1c85f56f638915693f49eb043c927c..d34593f5fb20f1e238e980e52fa2b7a704e53b8d 100644
--- a/Source/core/rendering/TextAutosizer.cpp
+++ b/Source/core/rendering/TextAutosizer.cpp
@@ -120,10 +120,8 @@ bool TextAutosizer::processSubtree(RenderObject* layoutRoot)
     // Largest area of block that can be visible at once (assuming the main
     // frame doesn't get scaled to less than overview scale), in CSS pixels.
     windowInfo.minLayoutSize = mainFrame->view()->layoutSize();
-    for (Frame* frame = m_document->frame(); frame; frame = frame->tree()->parent()) {
-        if (!frame->view()->isInChildFrameWithFrameFlattening())
-            windowInfo.minLayoutSize = windowInfo.minLayoutSize.shrunkTo(frame->view()->layoutSize());
-    }
+    for (Frame* frame = m_document->frame(); frame; frame = frame->tree()->parent())
+        windowInfo.minLayoutSize = windowInfo.minLayoutSize.shrunkTo(frame->view()->layoutSize());
 
     // The layoutRoot could be neither a container nor a cluster, so walk up the tree till we find each of these.
     RenderBlock* container = layoutRoot->isRenderBlock() ? toRenderBlock(layoutRoot) : layoutRoot->containingBlock();