Adds support for headless chrome embedder mojo services

content/renderer/mojo_bindings_controller.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 CONTENT_RENDERER_MOJO_BINDINGS_CONTROLLER_H_
 #define CONTENT_RENDERER_MOJO_BINDINGS_CONTROLLER_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "content/public/renderer/render_frame_observer.h"
 #include "content/public/renderer/render_frame_observer_tracker.h"
 #include "mojo/public/cpp/system/core.h"
 
 namespace gin {
 class PerContextData;
 }
 
 namespace content {
 
 class MojoContextState;
 
+enum class MojoBindingsType { FOR_UI_BINDINGS, FOR_LAYOUT_TESTS, FOR_HEADLESS };

[Charlie Reis, 2016/06/27 17:30:11]

nit: s/FOR_UI_BINDINGS/FOR_WEB_UI/

[alex clarke (OOO till 29th), 2016/07/29 09:06:23]

Done.

+
 // MojoBindingsController is responsible for enabling the renderer side of mojo
 // bindings. It creates (and destroys) a MojoContextState at the appropriate
 // times and handles the necessary browser messages. MojoBindingsController
 // destroys itself when the RendererFrame it is created with is destroyed.
 class MojoBindingsController
     : public RenderFrameObserver,
       public RenderFrameObserverTracker<MojoBindingsController> {
  public:
-  MojoBindingsController(RenderFrame* render_frame, bool for_layout_tests);
+  MojoBindingsController(RenderFrame* render_frame,
+                         MojoBindingsType bindings_type);
   void RunScriptsAtDocumentStart();
   void RunScriptsAtDocumentReady();
 
  private:
   ~MojoBindingsController() override;
 
   void CreateContextState();
   void DestroyContextState(v8::Local<v8::Context> context);
   MojoContextState* GetContextState();
 
   // RenderFrameObserver overrides:
   void WillReleaseScriptContext(v8::Local<v8::Context> context,
                                 int world_id) override;
   void DidClearWindowObject() override;
   void OnDestruct() override;
 
-  const bool for_layout_tests_;
+  const MojoBindingsType bindings_type_;
 
   DISALLOW_COPY_AND_ASSIGN(MojoBindingsController);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MOJO_BINDINGS_CONTROLLER_H_