Added allocator matcros to blink classes and structures in core/svg.

Source/core/svg/graphics/SVGImage.h

Index: Source/core/svg/graphics/SVGImage.h
diff --git a/Source/core/svg/graphics/SVGImage.h b/Source/core/svg/graphics/SVGImage.h
index f0a29c574f8394faf312686cef1abd0ad55172ca..f3822e40cd277ae6c0d2e5d2f589bc57948c26bf 100644
--- a/Source/core/svg/graphics/SVGImage.h
+++ b/Source/core/svg/graphics/SVGImage.h
@@ -31,6 +31,7 @@
 #include "platform/graphics/paint/DisplayItemClient.h"
 #include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
@@ -113,6 +114,7 @@ private:
 DEFINE_IMAGE_TYPE_CASTS(SVGImage);
 
 class ImageObserverDisabler {
+    STACK_ALLOCATED();
     WTF_MAKE_NONCOPYABLE(ImageObserverDisabler);
 public:
     ImageObserverDisabler(Image* image)