Lazily allocate svg shape transforms, shrink RenderSVGShape by 44B

Source/platform/transforms/AffineTransform.h

Index: Source/platform/transforms/AffineTransform.h
diff --git a/Source/platform/transforms/AffineTransform.h b/Source/platform/transforms/AffineTransform.h
index 772653b7409ea3ddeee89ae91e6a92376eb07b64..179ac8e8fe197ce4643d8627ee7e61e6c6889f28 100644
--- a/Source/platform/transforms/AffineTransform.h
+++ b/Source/platform/transforms/AffineTransform.h
@@ -156,6 +156,12 @@ public:
         return AffineTransform(1, 0, 0, 1, x, y);
     }
 
+    AffineTransform& operator =(const AffineTransform &t)

[fs, 2014/11/10 11:36:43]

Hmm, why was this needed? Worrying about self-assignments? (I don't see that
happening with the newly added code?)

+    {
+        setMatrix(t.m_transform);
+        return *this;
+    }
+
     // decompose the matrix into its component parts
     typedef struct {
         double scaleX, scaleY;