[Remoting Android] Fix thread issue with OpenGL drawable

remoting/client/display/gl_desktop.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 REMOTING_CLIENT_DISPLAY_GL_DESKTOP_H_
 #define REMOTING_CLIENT_DISPLAY_GL_DESKTOP_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 29 matching lines @@
  private:
   struct GlDesktopTextureContainer;
 
   void ReallocateTextures(const webrtc::DesktopSize& size);
 
   std::vector<std::unique_ptr<GlDesktopTextureContainer>> textures_;
 
   webrtc::DesktopSize last_desktop_size_;
   int max_texture_size_ = 0;
   base::WeakPtr<Canvas> canvas_ = nullptr;
-  base::ThreadChecker thread_checker_;
+  base::WeakPtr<Drawable> weak_ptr_;
   base::WeakPtrFactory<Drawable> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GlDesktop);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_CLIENT_DISPLAY_GL_DESKTOP_H_