Adding allocator annotations to blink classes and structs.

Source/bindings/core/v8/ToV8.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ToV8_h
 #define ToV8_h
 
 // toV8() provides C++ -> V8 conversion. Note that toV8() can return an empty
 // handle. Call sites must check IsEmpty() before using return value.
 
@@ skipping 155 matching lines @@
 
 // Identity operator
 
 inline v8::Local<v8::Value> toV8(v8::Local<v8::Value> value, v8::Local<v8::Object> creationContext, v8::Isolate*)
 {
     return value;
 }
 
 // Undefined
 
-struct ToV8UndefinedGenerator { }; // Used only for having toV8 return v8::Undefined.
+struct ToV8UndefinedGenerator {
+    DISALLOW_ALLOCATION();
+}; // Used only for having toV8 return v8::Undefined.
 
 inline v8::Local<v8::Value> toV8(const ToV8UndefinedGenerator&  value, v8::Local<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return v8::Undefined(isolate);
 }
 
 // ScriptValue
 
 inline v8::Local<v8::Value> toV8(const ScriptValue& value, v8::Local<v8::Object> creationContext, v8::Isolate*)
 {
@@ skipping 58 matching lines @@
 // Without toV8(void*, ...), call to toV8 with T* will match with
 // toV8(bool, ...) if T is not a subclass of ScriptWrappable or if T is
 // declared but not defined (so it's not clear that T is a subclass of
 // ScriptWrappable).
 // This hack helps detect such unwanted implicit conversions from T* to bool.
 v8::Local<v8::Value> toV8(void* value, v8::Local<v8::Object> creationContext, v8::Isolate*) = delete;
 
 } // namespace blink
 
 #endif // ToV8_h