Support rendering Android Native Pages in VR Shell.

chrome/browser/android/vr_shell/vr_shell_gl.h

 // Copyright 2016 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_BROWSER_ANDROID_VR_SHELL_VR_SHELL_GL_H_
 #define CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_GL_H_
 
 #include <memory>
 #include <queue>
 #include <utility>
@@ skipping 55 matching lines @@
   ~VrShellGl() override;
 
   void Initialize();
   void InitializeGl(gfx::AcceleratedWidget window);
 
   void OnTriggerEvent();
   void OnPause();
   void OnResume();
 
   void SetWebVrMode(bool enabled);
+  void CreateContentSurface();
   void ContentBoundsChanged(int width, int height);
   void ContentPhysicalBoundsChanged(int width, int height);
   void UIBoundsChanged(int width, int height);
   void UIPhysicalBoundsChanged(int width, int height);
   base::WeakPtr<VrShellGl> GetWeakPtr();
 
   void UpdateWebVRTextureBounds(int16_t frame_index,
                                 const gvr::Rectf& left_bounds,
                                 const gvr::Rectf& right_bounds);
   void SetGvrPoseForWebVr(const gvr::Mat4f& pose, uint32_t pose_num);
@@ skipping 21 matching lines @@
                     const std::vector<const ContentRectangle*>& elements);
   void DrawCursor(const gvr::Mat4f& render_matrix);
   void DrawWebVr();
   bool WebVrPoseByteIsValid(int pose_index_byte);
 
   void UpdateController(const gvr::Vec3f& forward_vector);
   void SendEventsToTarget(InputTarget input_target, int pixel_x,
                           int pixel_y);
   void SendGesture(InputTarget input_target,
                    std::unique_ptr<blink::WebInputEvent> event);
-
+  void CreateUiSurface();
   void OnUIFrameAvailable();
   void OnContentFrameAvailable();
   bool GetPixelEncodedFrameIndex(uint16_t* frame_index);
 
   void OnVSync();
 
   // VRVSyncProvider
   void GetVSync(const GetVSyncCallback& callback) override;
 
   void ForceExitVr();
@@ skipping 73 matching lines @@
   uint16_t last_frame_index_ = -1;
 
   base::WeakPtrFactory<VrShellGl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VrShellGl);
 };
 
 }  // namespace vr_shell
 
 #endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_GL_H_