Adding allocator annotations to blink classes and structs.

Source/bindings/core/v8/V8HiddenValue.h

Index: Source/bindings/core/v8/V8HiddenValue.h
diff --git a/Source/bindings/core/v8/V8HiddenValue.h b/Source/bindings/core/v8/V8HiddenValue.h
index 3943238b0ea4d794d38853952fb1410e5beaa10d..1687d2133d9920a581d84ff450df1e9fa3ee804a 100644
--- a/Source/bindings/core/v8/V8HiddenValue.h
+++ b/Source/bindings/core/v8/V8HiddenValue.h
@@ -8,6 +8,8 @@
 #include "bindings/core/v8/ScopedPersistent.h"
 #include "bindings/core/v8/ScriptPromiseProperties.h"
 #include "core/CoreExport.h"
+#include "wtf/Allocator.h"
+#include "wtf/PassOwnPtr.h"
 #include <v8.h>
 
 namespace blink {
@@ -46,7 +48,11 @@ class ScriptWrappable;
     SCRIPT_PROMISE_PROPERTIES(V, Resolver)
 
 class CORE_EXPORT V8HiddenValue {
+    WTF_MAKE_FAST_ALLOCATED(V8HiddenValue);
+    WTF_MAKE_NONCOPYABLE(V8HiddenValue);
 public:
+    static PassOwnPtr<V8HiddenValue> create() { return adoptPtr(new V8HiddenValue()); }
+
 #define V8_DECLARE_METHOD(name) static v8::Local<v8::String> name(v8::Isolate* isolate);
     V8_HIDDEN_VALUES(V8_DECLARE_METHOD);
 #undef V8_DECLARE_METHOD
@@ -57,6 +63,8 @@ public:
     static v8::Local<v8::Value> getHiddenValueFromMainWorldWrapper(v8::Isolate*, ScriptWrappable*, v8::Local<v8::String>);
 
 private:
+    V8HiddenValue() { }
+
 #define V8_DECLARE_FIELD(name) ScopedPersistent<v8::String> m_##name;
     V8_HIDDEN_VALUES(V8_DECLARE_FIELD);
 #undef V8_DECLARE_FIELD