Make platform/graphics to use USING_FAST_MALLOC.

third_party/WebKit/Source/platform/graphics/CompositingReasons.h

Index: third_party/WebKit/Source/platform/graphics/CompositingReasons.h
diff --git a/third_party/WebKit/Source/platform/graphics/CompositingReasons.h b/third_party/WebKit/Source/platform/graphics/CompositingReasons.h
index 2c2eceed6927809451a6e961d11e7462523bd610..2c978bec6693e66f6982ee3dacd0888f4a9aebc3 100644
--- a/third_party/WebKit/Source/platform/graphics/CompositingReasons.h
+++ b/third_party/WebKit/Source/platform/graphics/CompositingReasons.h
@@ -6,6 +6,7 @@
 #define CompositingReasons_h
 
 #include "platform/PlatformExport.h"
+#include "wtf/Allocator.h"
 #include "wtf/MathExtras.h"
 #include <stdint.h>
 
@@ -192,6 +193,7 @@ inline bool requiresSquashing(CompositingReasons reasons)
 }
 
 struct CompositingReasonStringMap {
+    STACK_ALLOCATED();
     CompositingReasons reason;
     const char* shortName;
     const char* description;