Implement lazy initialization for VrShellDelegate

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 64 matching lines @@
   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);
   gvr::Sizei GetWebVRCompositorSurfaceSize();
 
   void UpdateScene(std::unique_ptr<base::ListValue> commands);
 
   void UpdateVSyncInterval(int64_t timebase_nanos, double interval_seconds);
 
   void OnRequest(device::mojom::VRVSyncProviderRequest request);
   void ResetPose();
   void CreateVRDisplayInfo(
       const base::Callback<void(device::mojom::VRDisplayInfoPtr)>& callback,
@@ skipping 110 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_