Rewrite clipboard write IPC handling to be easier to understand.

content/renderer/scoped_clipboard_writer_glue.h

-// Copyright (c) 2013 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 CONTENT_RENDERER_SCOPED_CLIPBOARD_WRITER_GLUE_H_
-#define CONTENT_RENDERER_SCOPED_CLIPBOARD_WRITER_GLUE_H_
-
-#include "ui/base/clipboard/scoped_clipboard_writer.h"
-#include "base/memory/scoped_ptr.h"
-#include "content/renderer/clipboard_client.h"
-
-namespace content {
-
-class ScopedClipboardWriterGlue
-    : public ui::ScopedClipboardWriter {
- public:
-  explicit ScopedClipboardWriterGlue(ClipboardClient* client);
-
-  virtual ~ScopedClipboardWriterGlue();
-
-  void WriteBitmapFromPixels(const void* pixels, const gfx::Size& size);
-
- private:
-  scoped_ptr<ClipboardClient::WriteContext> context_;
-  DISALLOW_COPY_AND_ASSIGN(ScopedClipboardWriterGlue);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_SCOPED_CLIPBOARD_WRITER_GLUE_H_