Implement new Chromium IPCs for copying/dragging

chrome/browser/clipboard_dispatcher.h

Index: chrome/browser/clipboard_dispatcher.h
diff --git a/chrome/browser/clipboard_dispatcher.h b/chrome/browser/clipboard_dispatcher.h
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+// Copyright (c) 2010 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 CHROME_BROWSER_CLIPBOARD_DISPATCHER_H_
+#define CHROME_BROWSER_CLIPBOARD_DISPATCHER_H_
+
+#include <vector>
+
+#include "app/clipboard/clipboard.h"
+#include "base/basictypes.h"
+#include "base/string16.h"
+
+// This class backs IPC requests from the renderer for clipboard data. In this
+// context, clipboard does not only refer to the usual concept of a clipboard
+// for copy/paste, which is why it's not in app/clipboard/clipboard.h. It can
+// refer to one of three different types of clipboards:
+// - The copy/paste clipboard, which contains data that has been copied/cut.
+// - The dragging clipboard, which contains data that is currently being
+//   dragged.
+// - On X, the selection clipboard, which contains data for the current
+//   selection.
+class ClipboardDispatcher {
+ public:
+  static bool ReadAvailableTypes(Clipboard::Buffer buffer,
+                                 std::vector<string16>* types,
+                                 bool* contains_filenames);
+  static bool ReadData(Clipboard::Buffer buffer, const string16& type,
+                       string16* data, string16* metadata);
+  static bool ReadFilenames(Clipboard::Buffer buffer,
+                            std::vector<string16>* filenames);
+
+ private:
+  // This class is not meant to be instantiated. All public members are static.
+  ClipboardDispatcher();
+
+  DISALLOW_COPY_AND_ASSIGN(ClipboardDispatcher);
+};
+
+#endif  // CHROME_BROWSER_CLIPBOARD_DISPATCHER_H_
+