[Extensions Bindings] Request JS execution from messaging bindings

extensions/renderer/dispatcher.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_DISPATCHER_H_
 #define EXTENSIONS_RENDERER_DISPATCHER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 124 matching lines @@
 
   // Returns a list of (module name, resource id) pairs for the JS modules to
   // add to the source map.
   static std::vector<std::pair<const char*, int>> GetJsResources();
   static void RegisterNativeHandlers(ModuleSystem* module_system,
                                      ScriptContext* context,
                                      Dispatcher* dispatcher,
                                      ExtensionBindingsSystem* bindings_system,
                                      V8SchemaRegistry* v8_schema_registry);
 
+  ExtensionBindingsSystem* bindings_system() { return bindings_system_.get(); }
+
  private:
   // The RendererPermissionsPolicyDelegateTest.CannotScriptWebstore test needs
   // to call the OnActivateExtension IPCs.
   friend class ::ChromeRenderViewTest;
   FRIEND_TEST_ALL_PREFIXES(RendererPermissionsPolicyDelegateTest,
                            CannotScriptWebstore);
 
   // RenderThreadObserver implementation:
   bool OnControlMessageReceived(const IPC::Message& message) override;
   void IdleNotification() override;
@@ skipping 137 matching lines @@
   // if this renderer is a WebView guest render process. Otherwise, this will be
   // empty.
   std::string webview_partition_id_;
 
   DISALLOW_COPY_AND_ASSIGN(Dispatcher);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_DISPATCHER_H_