Remove GLImage::Destroy().

ui/gl/gl_image_ref_counted_memory.h

 // Copyright 2014 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_IMAGE_REF_COUNTED_MEMORY_H_
 #define UI_GL_GL_IMAGE_REF_COUNTED_MEMORY_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "ui/gl/gl_export.h"
 #include "ui/gl/gl_image_memory.h"
 
 namespace base {
 class RefCountedMemory;
 }
 
 namespace gl {
 
 class GL_EXPORT GLImageRefCountedMemory : public GLImageMemory {
  public:
   GLImageRefCountedMemory(const gfx::Size& size, unsigned internalformat);
 
   bool Initialize(base::RefCountedMemory* ref_counted_memory,
                   gfx::BufferFormat format);
 
   // Overridden from GLImage:
-  void Destroy(bool have_context) override;
   void OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd,
                     uint64_t process_tracing_id,
                     const std::string& dump_name) override;
 
  protected:
   ~GLImageRefCountedMemory() override;
 
  private:
   scoped_refptr<base::RefCountedMemory> ref_counted_memory_;
 
   DISALLOW_COPY_AND_ASSIGN(GLImageRefCountedMemory);
 };
 
 }  // namespace gl
 
 #endif  // UI_GL_GL_IMAGE_REF_COUNTED_MEMORY_H_