Make classes and structures in core/events and core/fetch fast-allocated.

Source/core/fetch/SubstituteData.h

Index: Source/core/fetch/SubstituteData.h
diff --git a/Source/core/fetch/SubstituteData.h b/Source/core/fetch/SubstituteData.h
index f5477cd156c8bde02f8a9056cf70e6bf9765b935..43f98ae78643dfa9a3d206377184b12be95441ea 100644
--- a/Source/core/fetch/SubstituteData.h
+++ b/Source/core/fetch/SubstituteData.h
@@ -28,6 +28,7 @@
 
 #include "platform/SharedBuffer.h"
 #include "platform/weborigin/KURL.h"
+#include "wtf/Allocator.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
@@ -39,6 +40,7 @@ enum SubstituteDataLoadPolicy {
 };
 
 class SubstituteData {
+    DISALLOW_ALLOCATION();
 public:
     SubstituteData()
         : m_substituteDataLoadPolicy(LoadNormally)