Add RenderObject::needsResizeLayout

Source/core/rendering/RenderBox.h

Index: Source/core/rendering/RenderBox.h
diff --git a/Source/core/rendering/RenderBox.h b/Source/core/rendering/RenderBox.h
index d546a06a66bc5e72f18b50919096123a69aa30e0..b30ca38b5eb2653b66e9c5b281eb9bf7f92822ba 100644
--- a/Source/core/rendering/RenderBox.h
+++ b/Source/core/rendering/RenderBox.h
@@ -530,6 +530,21 @@ public:
         return true;
     }
 
+    bool tryLayoutDoingResizeOnly()

[esprehn, 2014/03/24 22:40:04]

This should not be inline in the header. Move it to the cpp file.

[Xianzhu, 2014/03/24 23:53:24]

Done.

+    {
+        // FIXME: For now this is for RenderView only. Needs more verifications before applied to generic objects.
+        ASSERT(isRenderView());
+
+        LayoutRectRecorder recorder(*this);
+        LayoutUnit oldWidth = width();
+        updateLogicalWidth();
+        // If we shrink to fit our width may have changed, so we still need full layout.
+        if (oldWidth != width())
+            return false;
+        updateLogicalHeight();
+        return true;
+    }
+
     LayoutRect maskClipRect();
 
     virtual PositionWithAffinity positionForPoint(const LayoutPoint&) OVERRIDE;