Update vsync override in PostSubBuffers.

ui/gl/gl_surface_egl.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_EGL_H_
 #define UI_GL_GL_SURFACE_EGL_H_
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
@@ skipping 111 matching lines @@
   EGLNativeWindowType window_;
   gfx::Size size_;
   bool enable_fixed_size_angle_;
 
   void OnSetSwapInterval(int interval) override;
 
  private:
   // Commit the |pending_overlays_| and clear the vector. Returns false if any
   // fail to be committed.
   bool CommitAndClearPendingOverlays();
+  void UpdateSwapInterval();
 
   EGLSurface surface_;
   bool supports_post_sub_buffer_;
   bool flips_vertically_;
 
   std::unique_ptr<gfx::VSyncProvider> vsync_provider_;
 
   int swap_interval_;
 
   std::vector<GLSurfaceOverlay> pending_overlays_;
@@ skipping 63 matching lines @@
   ~SurfacelessEGL() override;
 
  private:
   gfx::Size size_;
   DISALLOW_COPY_AND_ASSIGN(SurfacelessEGL);
 };
 
 }  // namespace gl
 
 #endif  // UI_GL_GL_SURFACE_EGL_H_