Implement a module system for the extension bindings JS.

chrome/renderer/extensions/chrome_v8_context.h

 // Copyright (c) 2012 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 CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_H_
 #define CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_H_
 #pragma once
 
 #include <string>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "v8/include/v8.h"
 
 namespace WebKit {
 class WebFrame;
 }
 
 namespace content {
 class RenderView;
 }
 
+class ChromeV8Extension;
+
 // Chrome's wrapper for a v8 context.
 //
 // TODO(aa): Consider converting this back to a set of bindings_utils. It would
 // require adding WebFrame::GetIsolatedWorldIdByV8Context() to WebCore, but then
 // we won't need this object and it's a bit less state to keep track of.
 class ChromeV8Context {
  public:
   ChromeV8Context(v8::Handle<v8::Context> context,
                   WebKit::WebFrame* frame,
                   const std::string& extension_id);
@@ skipping 40 matching lines @@
   // Call the named method of the chromeHidden object in this context.
   // The function can be a sub-property like "Port.dispatchOnMessage". Returns
   // the result of the function call in |result| if |result| is non-NULL. If the
   // named method does not exist, returns false.
   bool CallChromeHiddenMethod(
       const std::string& function_name,
       int argc,
       v8::Handle<v8::Value>* argv,
       v8::Handle<v8::Value>* result) const;
 
+  void RegisterExtension(ChromeV8Extension* extension);

[Aaron Boodman, 2012/02/16 01:54:42]

Needs comments.

+
+  v8::Handle<v8::Object> natives() const { return natives_; }
+
  private:
   // The v8 context the bindings are accessible to. We keep a strong reference
   // to it for simplicity. In the case of content scripts, this is necessary
   // because we want all scripts from the same extension for the same frame to
   // run in the same context, so we can't have the contexts being GC'd if
   // nothing is happening. In the case of page contexts, this isn't necessary
   // since the DOM keeps the context alive, but it makes things simpler to not
   // distinguish the two cases.
   v8::Persistent<v8::Context> v8_context_;
 
+  v8::Persistent<v8::Object> natives_;

[Aaron Boodman, 2012/02/16 01:54:42]

needs comments.

+
   // The WebFrame associated with this context. This can be NULL because this
   // object can outlive is destroyed asynchronously.
   WebKit::WebFrame* web_frame_;
 
   // The extension ID this context is associated with.
   std::string extension_id_;
 
+  // The list of extensions this context owns.
+  std::vector<ChromeV8Extension*> extensions_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeV8Context);
 };
 
 #endif  // CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_H_