Implement our own GLThread for VR Shell.

ui/gl/android/surface_texture.h

 // Copyright 2013 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 UI_GL_ANDROID_SURFACE_TEXTURE_H_
 #define UI_GL_ANDROID_SURFACE_TEXTURE_H_
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
@@ skipping 44 matching lines @@
   // Creates a native render surface for this surface texture.
   // The caller must release the underlying reference when done with the handle
   // by calling ANativeWindow_release().
   ANativeWindow* CreateSurface();
 
   // Release the SurfaceTexture back buffers.  The SurfaceTexture is no longer
   // usable after calling this.  Note that this is not called 'Release', like
   // the android API, because scoped_refptr<> calls that quite a bit.
   void ReleaseSurfaceTexture();
 
+  // Set the default buffer size for the surface texture.
+  void SetDefaultBufferSize(int width, int height);
+
   const base::android::JavaRef<jobject>& j_surface_texture() const {
     return j_surface_texture_;
   }
 
  protected:
   explicit SurfaceTexture(
       const base::android::ScopedJavaLocalRef<jobject>& j_surface_texture);
 
  private:
   friend class base::RefCountedThreadSafe<SurfaceTexture>;
   ~SurfaceTexture();
 
   // Java SurfaceTexture instance.
   base::android::ScopedJavaGlobalRef<jobject> j_surface_texture_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfaceTexture);
 };
 
 }  // namespace gl
 
 #endif  // UI_GL_ANDROID_SURFACE_TEXTURE_H_