[part 1] Make classes and structures in modules/ fast-allocated.

Source/modules/canvas2d/ClipList.h

Index: Source/modules/canvas2d/ClipList.h
diff --git a/Source/modules/canvas2d/ClipList.h b/Source/modules/canvas2d/ClipList.h
index b50c208349f93a7dc2dd68cc751cda641f6ac6a7..9301b9774155f4632114e732bcc494c8bb5f515a 100644
--- a/Source/modules/canvas2d/ClipList.h
+++ b/Source/modules/canvas2d/ClipList.h
@@ -6,6 +6,7 @@
 #define ClipList_h
 
 #include "platform/graphics/GraphicsTypes.h"
+#include "wtf/Allocator.h"
 #include "wtf/Vector.h"
 
 class SkCanvas;
@@ -16,6 +17,7 @@ namespace blink {
 class AffineTransform;
 
 class ClipList {
+    DISALLOW_ALLOCATION();
 public:
     ClipList() { }
     ClipList(const ClipList&);