Extensions: run "custom bindings" v8-extensions in content scripts.

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 "base/basictypes.h"
 #include "v8/include/v8.h"
 
 namespace WebKit {
 class WebFrame;
 }
 
 namespace content {
 class RenderView;
 }
 
 // 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:
+  enum ContextType {
+    CONTENT_SCRIPT,
+
+    // TODO(kalman): for now, have this as OTHER, since we only currently need
+    // know whether something is a content script or not. However, when
+    // necessary this should enumerate the other types, such as FRAME.
+    OTHER
+  };
+
   ChromeV8Context(v8::Handle<v8::Context> context,
                   WebKit::WebFrame* frame,
-                  const std::string& extension_id);
+                  const std::string& extension_id,
+                  ContextType context_type);
   ~ChromeV8Context();
 
   v8::Handle<v8::Context> v8_context() const {
     return v8_context_;
   }
 
   const std::string& extension_id() const {
     return extension_id_;
   }
 
   WebKit::WebFrame* web_frame() const {
     return web_frame_;
   }
   void clear_web_frame() {
     web_frame_ = NULL;
   }
 
+  ContextType context_type() const {
+    return context_type_;
+  }
+
   // Returns a special Chrome-specific hidden object that is associated with a
   // context, but not reachable from the JavaScript in that context. This is
   // used by our v8::Extension implementations as a way to share code and as a
   // bridge between C++ and JavaScript.
   static v8::Handle<v8::Value> GetOrCreateChromeHidden(
       v8::Handle<v8::Context> context);
 
   // Return the chromeHidden object associated with this context, or an empty
   // handle if no chrome hidden has been created (by GetOrCreateChromeHidden)
   // yet for this context.
@@ skipping 30 matching lines @@
   // distinguish the two cases.
   v8::Persistent<v8::Context> v8_context_;
 
   // 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 type of context.
+  ContextType context_type_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeV8Context);
 };
 
 #endif  // CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_H_