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

Source/modules/canvas2d/CanvasRenderingContext2DState.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CanvasRenderingContext2DState_h
 #define CanvasRenderingContext2DState_h
 
 #include "core/css/CSSFontSelectorClient.h"
 #include "modules/canvas2d/ClipList.h"
 #include "platform/fonts/Font.h"
 #include "platform/transforms/AffineTransform.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class CanvasStyle;
 class CSSValue;
 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()
     {
         return adoptPtrWillBeNoop(new CanvasRenderingContext2DState);
     }
 
     ~CanvasRenderingContext2DState() override;
 
     DECLARE_VIRTUAL_TRACE();
 
@@ skipping 183 matching lines @@
     mutable bool m_fillStyleDirty : 1;
     mutable bool m_strokeStyleDirty : 1;
     mutable bool m_lineDashDirty : 1;
 
     ClipList m_clipList;
 };
 
 } // blink
 
 #endif