Queue postMessage messages destined for a MimeHandlerView guest

extensions/renderer/scoped_persistent.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 EXTENSIONS_RENDERER_SCOPED_PERSISTENT_H_
 #define EXTENSIONS_RENDERER_SCOPED_PERSISTENT_H_
 
 #include "base/logging.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 
 // A v8::Persistent handle to a V8 value which destroys and clears the
 // underlying handle on destruction.
 template <typename T>
 class ScopedPersistent {
  public:
   ScopedPersistent() {}
 
   explicit ScopedPersistent(v8::Handle<T> handle) { reset(handle); }
 
+  ScopedPersistent(v8::Isolate* isolate, v8::Handle<T> handle) {
+    reset(isolate, handle);
+  }
+
   ~ScopedPersistent() { reset(); }
 
-  void reset(v8::Handle<T> handle) {
+  void reset(v8::Isolate* isolate, v8::Handle<T> handle) {
     if (!handle.IsEmpty())
-      handle_.Reset(GetIsolate(handle), handle);
+      handle_.Reset(isolate, handle);
     else
       reset();
   }
 
+  void reset(v8::Handle<T> handle) { reset(GetIsolate(handle), handle); }
+
   void reset() { handle_.Reset(); }
 
   bool IsEmpty() const { return handle_.IsEmpty(); }
 
   v8::Handle<T> NewHandle() const {
     if (handle_.IsEmpty())
       return v8::Local<T>();
     return v8::Local<T>::New(GetIsolate(handle_), handle_);
   }
 
@@ skipping 29 matching lines @@
   }
 
   v8::Persistent<T> handle_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedPersistent);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_SCOPED_PERSISTENT_H_