Move clipboard-related webkit_glue embedder functions into a ClipboardClient interface.

ui/base/clipboard/scoped_clipboard_writer.cc

 // Copyright (c) 2011 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.
 
 // This file implements the ScopedClipboardWriter class. Documentation on its
 // purpose can be found in our header. Documentation on the format of the
 // parameters for each clipboard target can be found in clipboard.h.
 
 #include "ui/base/clipboard/scoped_clipboard_writer.h"
 
@@ skipping 70 matching lines @@
   WriteHTML(UTF8ToUTF16(html), std::string());
 }
 
 void ScopedClipboardWriter::WriteWebSmartPaste() {
   objects_[Clipboard::CBF_WEBKIT] = Clipboard::ObjectMapParams();
 }
 
 void ScopedClipboardWriter::WriteBitmapFromPixels(const void* pixels,
                                                   const gfx::Size& size) {
   Clipboard::ObjectMapParam pixels_parameter, size_parameter;
-  const char* pixels_data = reinterpret_cast<const char*>(pixels);
+  const char* pixels_data = static_cast<const char*>(pixels);
   size_t pixels_length = 4 * size.width() * size.height();
   for (size_t i = 0; i < pixels_length; i++)
     pixels_parameter.push_back(pixels_data[i]);
 
   const char* size_data = reinterpret_cast<const char*>(&size);
   size_t size_length = sizeof(gfx::Size);
   for (size_t i = 0; i < size_length; i++)
     size_parameter.push_back(size_data[i]);
 
   Clipboard::ObjectMapParams parameters;
@@ skipping 29 matching lines @@
   objects_[Clipboard::CBF_TEXT] = parameters;
 
   if (is_url) {
     url_text_ = utf8_text;
   } else {
     url_text_.clear();
   }
 }
 
 }  // namespace ui