Clear the clipboard closing Incognito window

content/public/test/clipboard_write_observer.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_PUBLIC_TEST_CLIPBOARD_WRITE_OBSERVER_H_
+#define CONTENT_PUBLIC_TEST_CLIPBOARD_WRITE_OBSERVER_H_
+
+#include "base/basictypes.h"
+#include "ui/base/clipboard/clipboard.h"
+
+namespace content {
+
+class MessageLoopRunner;
+
+// ClipboardWriteObserver allows user to wait until Clipboard::WriteObjects has
+// finished.
+class ClipboardWriteObserver :

[jam, 2013/02/11 21:28:53]

i try to keep the number of files in content/public/test to a minimum, since the
more there are the harder it is to find the frequently used ones. with the other
suggestion about using a callback instead of an interface, this should go away.

[vasilii, 2013/02/12 15:58:32]

I don't understand how callback can help me. This class is shared between
chrome/browser/profiles/incognito_selection_clipboard_uitest.cc and
content/browser/renderer_host/clipboard_browsertest.cc. Where can I put this
code?

[vasilii, 2013/02/12 17:25:18]

Please note that the current OnWriteObjects() not only interrupts the message
loop but also checks the |buffer|. Do you agree to copy/paste that logic across
the two test files?

[vasilii, 2013/02/13 16:57:26]

Done.

+    public ui::Clipboard::ClipboardObserverForTesting {
+ public:
+  explicit ClipboardWriteObserver(ui::Clipboard* clipboard,

[dcheng, 2013/02/11 22:58:21]

explicit is only required for single-argument ctors.

[vasilii, 2013/02/12 15:58:32]

Done.

+                                  ui::Clipboard::Buffer buffer);
+  virtual ~ClipboardWriteObserver();
+
+  void Wait();
+ private:
+  virtual void OnWriteObjects(ui::Clipboard::Buffer buffer) OVERRIDE;
+
+  bool seen_;
+  bool running_;
+  ui::Clipboard::Buffer buffer_;
+  scoped_refptr<MessageLoopRunner> message_loop_runner_;
+  ui::Clipboard* clipboard_;
+
+  DISALLOW_COPY_AND_ASSIGN(ClipboardWriteObserver);
+};
+
+}  // namespace content
+#endif  // CONTENT_PUBLIC_TEST_CLIPBOARD_WRITE_OBSERVER_H_