[Extensions Bindings] Request JS execution from messaging bindings

extensions/renderer/extensions_renderer_client.h

Index: extensions/renderer/extensions_renderer_client.h
diff --git a/extensions/renderer/extensions_renderer_client.h b/extensions/renderer/extensions_renderer_client.h
index b8f5255b44531b206e0fa86ad4aa1b61bf3380d7..8ead04cf2016c92c9a1855983698f1c084d77836 100644
--- a/extensions/renderer/extensions_renderer_client.h
+++ b/extensions/renderer/extensions_renderer_client.h
@@ -6,6 +6,7 @@
 #define EXTENSIONS_RENDERER_EXTENSIONS_RENDERER_CLIENT_H_
 
 namespace extensions {
+class Dispatcher;
 
 // Interface to allow the extensions module to make render-process-specific
 // queries of the embedder. Should be Set() once in the render process.
@@ -25,6 +26,9 @@ class ExtensionsRendererClient {
   // (third_party/WebKit/public/web/WebFrame.h) for additional context.
   virtual int GetLowestIsolatedWorldId() const = 0;
 
+  // Returns the associated Dispatcher.
+  virtual Dispatcher* GetDispatcher() = 0;
+
   // Returns the single instance of |this|.
   static ExtensionsRendererClient* Get();