Add glue for supporting custom MIME types in DataTransfer.

webkit/glue/webclipboard_impl.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.
 
 #include "webkit/glue/webclipboard_impl.h"
 
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "googleurl/src/gurl.h"
@@ skipping 155 matching lines @@
 WebData WebClipboardImpl::readImage(Buffer buffer) {
   ui::Clipboard::Buffer buffer_type;
   if (!ConvertBufferType(buffer, &buffer_type))
     return WebData();
 
   std::string png_data;
   client_->ReadImage(buffer_type, &png_data);
   return WebData(png_data);
 }
 
+WebString WebClipboardImpl::readCustomData(Buffer buffer,
+                                           const WebString& type) {
+  ui::Clipboard::Buffer buffer_type;
+  if (!ConvertBufferType(buffer, &buffer_type))
+    return WebString();
+
+  string16 data;
+  client_->ReadCustomData(buffer_type, type, &data);
+  return data;
+}
+
 void WebClipboardImpl::writeHTML(
     const WebString& html_text, const WebURL& source_url,
     const WebString& plain_text, bool write_smart_paste) {
   ScopedClipboardWriterGlue scw(client_);
   scw.WriteHTML(html_text, source_url.spec());
   scw.WriteText(plain_text);
 
   if (write_smart_paste)
     scw.WriteWebSmartPaste();
 }
@@ skipping 63 matching lines @@
       break;
 #endif
     default:
       NOTREACHED();
       return false;
   }
   return true;
 }
 
 }  // namespace webkit_glue