Add menu mode plumbing for WebVR mode.

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 98 matching lines @@
       uint32_t device_id);
   void SubmitWebVRFrame(int16_t frame_index, const gpu::MailboxHolder& mailbox);
   void SetSubmitClient(
       device::mojom::VRSubmitFrameClientPtrInfo submit_client_info);
 
  private:
   void GvrInit(gvr_context* gvr_api);
   void InitializeRenderer();
   void DrawFrame(int16_t frame_index);
   void DrawVrShellAndUnbind(const gvr::Mat4f& head_pose, gvr::Frame& frame);
-  void DrawUiView(const gvr::Mat4f* head_pose,
+  void DrawUiView(const gvr::Mat4f& head_pose,
                   const std::vector<const ContentRectangle*>& elements,
                   const gvr::Sizei& render_size,
-                  int viewport_offset);
+                  int viewport_offset,
+                  bool draw_cursor);
   void DrawElements(const gvr::Mat4f& view_proj_matrix,
-                    const gvr::Mat4f& view_matrix,
                     const std::vector<const ContentRectangle*>& elements);
   std::vector<const ContentRectangle*> GetElementsInDrawOrder(
       const gvr::Mat4f& view_matrix,
       const std::vector<const ContentRectangle*>& elements);
   void DrawCursor(const gvr::Mat4f& render_matrix);
+  bool ShouldDrawWebVr();
   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();
@@ skipping 93 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_