Implement chrome.extension.connectExternal and fix various API inconsistencies.

chrome/renderer/extensions/bindings_utils.h

 // Copyright (c) 2009 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_BINDINGS_UTILS_H_
 #define CHROME_RENDERER_EXTENSIONS_BINDINGS_UTILS_H_
 
 #include "app/resource_bundle.h"
 #include "base/linked_ptr.h"
 #include "base/singleton.h"
@@ skipping 10 matching lines @@
 // This is a base class for chrome extension bindings.  Common features that
 // are shared by different modules go here.
 class ExtensionBase : public v8::Extension {
  public:
   ExtensionBase(const char* name,
                 const char* source,
                 int dep_count,
                 const char** deps)
       : v8::Extension(name, source, dep_count, deps) {}
 
+  // Note: do not call this function before or during the chromeHidden.onLoad
+  // event dispatch. The URL might not have been committed yet and might not
+  // be an extension URL.
+  static std::string ExtensionIdForCurrentContext();
+
   // Derived classes should call this at the end of their implementation in
   // order to expose common native functions, like GetChromeHidden, to the
   // v8 extension.
   virtual v8::Handle<v8::FunctionTemplate>
       GetNativeFunction(v8::Handle<v8::String> name);
 
  protected:
   // Returns a hidden variable for use by the bindings that is unreachable
   // by the page.
   static v8::Handle<v8::Value> GetChromeHidden(const v8::Arguments& args);
@@ skipping 76 matching lines @@
 // be a sub-property like "Port.dispatchOnMessage". Returns the result of 
 // the function call. If an exception is thrown an empty Handle will be
 // returned.
 v8::Handle<v8::Value> CallFunctionInContext(v8::Handle<v8::Context> context,
     const std::string& function_name, int argc,
     v8::Handle<v8::Value>* argv);
 
 }  // namespace bindings_utils
 
 #endif  // CHROME_RENDERER_EXTENSIONS_BINDINGS_UTILS_H_