Make classes and structures in core/paint fast-allocated.

Source/core/paint/ClipScope.h

Index: Source/core/paint/ClipScope.h
diff --git a/Source/core/paint/ClipScope.h b/Source/core/paint/ClipScope.h
index 38896b510faf54861d49a7101c44597da0e6cd45..71df08677b2f26b5a63092bbd4ae35f2e1917021 100644
--- a/Source/core/paint/ClipScope.h
+++ b/Source/core/paint/ClipScope.h
@@ -6,10 +6,13 @@
 #define ClipScope_h
 
 #include "platform/graphics/GraphicsContext.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
 class ClipScope {
+    ALLOW_ONLY_INLINE_ALLOCATION();
+    WTF_MAKE_NONCOPYABLE(ClipScope);
 public:
     ClipScope(GraphicsContext* context)
         : m_context(context)
@@ -21,7 +24,6 @@ public:
 private:
     GraphicsContext* m_context;
     int m_clipCount;
-    WTF_MAKE_NONCOPYABLE(ClipScope);
 };
 
 } // namespace blink