Fix WebVR support for devices without Async Reprojection.

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 "base/cancelable_callback.h"
@@ skipping 39 matching lines @@
     CONTENT,
     UI
   };
 
   VrShellGl(
       const base::WeakPtr<VrShell>& weak_vr_shell,
       const base::WeakPtr<VrInputManager>& content_input_manager,
       const base::WeakPtr<VrInputManager>& ui_input_manager,
       scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner,
       gvr_context* gvr_api,
-      bool initially_web_vr);
+      bool initially_web_vr,
+      bool reprojected_rendering);
   ~VrShellGl();
 
-  bool Initialize();
+  void Initialize();
+  void InitializeGl(gfx::AcceleratedWidget window);
 
   void DrawFrame();
 
   void OnTriggerEvent();
   void OnPause();
   void OnResume();
 
   void SetWebVrMode(bool enabled);
   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(const gvr::Rectf& left_bounds,
                                 const gvr::Rectf& right_bounds);
   gvr::GvrApi* gvr_api();
   void SetGvrPoseForWebVr(const gvr::Mat4f& pose, uint32_t pose_num);
   gvr::Sizei GetWebVRCompositorSurfaceSize();
 
   void UpdateScene(std::unique_ptr<base::ListValue> commands);
 
  private:
-  bool InitializeGl();
   void GvrInit(gvr_context* gvr_api);
   void InitializeRenderer();
   void DrawVrShell(const gvr::Mat4f& head_pose, gvr::Frame &frame);
   void DrawUiView(const gvr::Mat4f* head_pose,
                   const std::vector<const ContentRectangle*>& elements,
                   const gvr::Sizei& render_size, int viewport_offset);
   void DrawElements(const gvr::Mat4f& render_matrix,
                     const std::vector<const ContentRectangle*>& elements);
   void DrawCursor(const gvr::Mat4f& render_matrix);
   void DrawWebVr();
@@ skipping 58 matching lines @@
   gvr::Sizei ui_tex_physical_size_ = {0, 0};
 
   // The pose ring buffer size must be a power of two to avoid glitches when
   // the pose index wraps around. It should be large enough to handle the
   // current backlog of poses which is 2-3 frames.
   static constexpr int kPoseRingBufferSize = 8;
   std::vector<gvr::Mat4f> webvr_head_pose_;
   std::vector<bool> webvr_head_pose_valid_;
   int webvr_texture_id_ = 0;
   bool web_vr_mode_;
+  bool ready_to_draw_ = false;
+  bool surfaceless_rendering_;
 
   std::unique_ptr<VrController> controller_;
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   base::CancelableClosure draw_task_;
   base::TimeTicks vsync_timebase_;
   base::TimeDelta vsync_interval_;
 
   base::WeakPtr<VrShell> weak_vr_shell_;
   base::WeakPtr<VrInputManager> content_input_manager_;
   base::WeakPtr<VrInputManager> ui_input_manager_;
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
 
   base::WeakPtrFactory<VrShellGl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VrShellGl);
 };
 
 }  // namespace vr_shell
 
 #endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_GL_H_