Remove GLContext::Destroy

ui/gl/gl_context.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_CONTEXT_H_
 #define UI_GL_GL_CONTEXT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 24 matching lines @@
  public:
   explicit GLContext(GLShareGroup* share_group);
 
   // Initializes the GL context to be compatible with the given surface. The GL
   // context can be made with other surface's of the same type. The compatible
   // surface is only needed for certain platforms like WGL, OSMesa and GLX. It
   // should be specific for all platforms though.
   virtual bool Initialize(
       GLSurface* compatible_surface, GpuPreference gpu_preference) = 0;
 
-  // Destroys the GL context.
-  virtual void Destroy() = 0;
-
   // Makes the GL context and a surface current on the current thread.
   virtual bool MakeCurrent(GLSurface* surface) = 0;
 
   // Releases this GL context and surface as current on the current thread.
   virtual void ReleaseCurrent(GLSurface* surface) = 0;
 
   // Returns true if this context and surface is current. Pass a null surface
   // if the current surface is not important.
   virtual bool IsCurrent(GLSurface* surface) = 0;
 
@@ skipping 149 matching lines @@
   void SetCurrent(GLSurface* surface) override;
 
  private:
   scoped_ptr<gfx::GPUTiming> gpu_timing_;
   DISALLOW_COPY_AND_ASSIGN(GLContextReal);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_CONTEXT_H_