Make platform/graphics to use USING_FAST_MALLOC.

third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h

Index: third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h b/third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h
index 500cbf82877f36cde9378d715d90c9ce07329933..632fa11d2677a35c0755d2c8991722d5ed772cf4 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h
+++ b/third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h
@@ -8,7 +8,9 @@
 #include "platform/PlatformExport.h"
 #include "platform/graphics/ContiguousContainer.h"
 #include "platform/graphics/paint/DisplayItemClient.h"
+#include "wtf/Allocator.h"
 #include "wtf/Assertions.h"
+#include "wtf/Noncopyable.h"
 #include "wtf/PassOwnPtr.h"
 
 #ifndef NDEBUG
@@ -24,6 +26,7 @@ class IntRect;
 class WebDisplayItemList;
 
 class PLATFORM_EXPORT DisplayItem {
+    DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
 public:
     enum {
         // Must be kept in sync with core/paint/PaintPhase.h.
@@ -209,6 +212,7 @@ public:
 
     // Ids are for matching new DisplayItems with existing DisplayItems.
     struct Id {
+        STACK_ALLOCATED();
         Id(const DisplayItemClient client, const Type type, const unsigned scope)
             : client(client)
             , type(type)