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

Source/modules/canvas2d/TouchHitRegion.h

Index: Source/modules/canvas2d/TouchHitRegion.h
diff --git a/Source/modules/canvas2d/TouchHitRegion.h b/Source/modules/canvas2d/TouchHitRegion.h
index 7730e3c1d2af8344db5792fa3dfff30a27398925..42eb2ec08c29c71cb56046a1148b90487dfd7a13 100644
--- a/Source/modules/canvas2d/TouchHitRegion.h
+++ b/Source/modules/canvas2d/TouchHitRegion.h
@@ -6,12 +6,14 @@
 #define TouchHitRegion_h
 
 #include "modules/canvas2d/EventHitRegion.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
 class Touch;
 
 class TouchHitRegion : public EventHitRegion {
+    STATIC_ONLY(TouchHitRegion);
 public:
     static String region(Touch&);
 };