Adding status to swap complete

ui/gl/gl_surface_glx.h

 // Copyright (c) 2012 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_GL_SURFACE_GLX_H_
 #define UI_GL_GL_SURFACE_GLX_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 43 matching lines @@
 class GL_EXPORT NativeViewGLSurfaceGLX : public GLSurfaceGLX,
                                          public ui::PlatformEventDispatcher {
  public:
   explicit NativeViewGLSurfaceGLX(gfx::AcceleratedWidget window);
 
   // Implement GLSurfaceGLX.
   bool Initialize() override;
   void Destroy() override;
   bool Resize(const gfx::Size& size) override;
   bool IsOffscreen() override;
-  bool SwapBuffers() override;
+  gfx::SwapResult SwapBuffers() override;
   gfx::Size GetSize() override;
   void* GetHandle() override;
   bool SupportsPostSubBuffer() override;
   void* GetConfig() override;
-  bool PostSubBuffer(int x, int y, int width, int height) override;
+  gfx::SwapResult PostSubBuffer(int x, int y, int width, int height) override;
   VSyncProvider* GetVSyncProvider() override;
 
  protected:
   ~NativeViewGLSurfaceGLX() override;
 
  private:
   // The handle for the drawable to make current or swap.
   gfx::AcceleratedWidget GetDrawableHandle() const;
 
   // PlatformEventDispatcher implementation
@@ skipping 16 matching lines @@
 
 // A surface used to render to an offscreen pbuffer.
 class GL_EXPORT UnmappedNativeViewGLSurfaceGLX : public GLSurfaceGLX {
  public:
   explicit UnmappedNativeViewGLSurfaceGLX(const gfx::Size& size);
 
   // Implement GLSurfaceGLX.
   bool Initialize() override;
   void Destroy() override;
   bool IsOffscreen() override;
-  bool SwapBuffers() override;
+  gfx::SwapResult SwapBuffers() override;
   gfx::Size GetSize() override;
   void* GetHandle() override;
   void* GetConfig() override;
 
  protected:
   ~UnmappedNativeViewGLSurfaceGLX() override;
 
  private:
   gfx::Size size_;
   void* config_;
   // Unmapped dummy window, used to provide a compatible surface.
   gfx::AcceleratedWidget window_;
 
   DISALLOW_COPY_AND_ASSIGN(UnmappedNativeViewGLSurfaceGLX);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_SURFACE_GLX_H_