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

Source/modules/canvas2d/CanvasRenderingContext2DState.h

Index: Source/modules/canvas2d/CanvasRenderingContext2DState.h
diff --git a/Source/modules/canvas2d/CanvasRenderingContext2DState.h b/Source/modules/canvas2d/CanvasRenderingContext2DState.h
index 628f3cd0e7e75721e5dd90291b17dfada4bad97d..551c1d0c70676f029a148c73bcd9a1ce15586550 100644
--- a/Source/modules/canvas2d/CanvasRenderingContext2DState.h
+++ b/Source/modules/canvas2d/CanvasRenderingContext2DState.h
@@ -19,6 +19,7 @@ class Element;
 
 class CanvasRenderingContext2DState final : public NoBaseWillBeGarbageCollectedFinalized<CanvasRenderingContext2DState>, public CSSFontSelectorClient {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(CanvasRenderingContext2DState);
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(CanvasRenderingContext2DState);
 public:
     static PassOwnPtrWillBeRawPtr<CanvasRenderingContext2DState> create()
     {