Clear the clipboard closing Incognito window

content/browser/renderer_host/clipboard_browsertest.cc

+// 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.
+
+#include "base/utf_string_conversions.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/test/clipboard_write_observer.h"
+#include "content/shell/shell.h"
+#include "content/test/content_browser_test.h"
+#include "content/test/content_browser_test_utils.h"
+#include "ui/base/clipboard/scoped_clipboard_writer.h"
+
+namespace content {
+
+class OffTheRecordClipboardTest : public ContentBrowserTest {
+ protected:
+  ui::Clipboard* clipboard() const {
+    static ui::Clipboard* clipboard = ui::Clipboard::GetForCurrentThread();
+    return clipboard;
+  }
+  void ExpectStringInClipboard(const string16& pattern) {
+    string16 content;
+    clipboard()->ReadText(ui::Clipboard::BUFFER_STANDARD, &content);
+    EXPECT_EQ(pattern, content);
+  }
+};
+
+// Tests that data copied from content area of OffTheRecord window is destroyed
+// after context destruction.
+IN_PROC_BROWSER_TEST_F(OffTheRecordClipboardTest, PRE_ClearContentData) {
+  Shell* shell_offtherecord = CreateOffTheRecordBrowser();
+  NavigateToURL(shell_offtherecord, GURL("data:text/plain,foo"));
+  // Clear the clipboard. Currently GTK Clipboard::Clear fails to clear
+  // clipboard from external content.
+  {
+    ui::ScopedClipboardWriter clipboard_writer(clipboard(),
+                                               ui::Clipboard::BUFFER_STANDARD);
+    clipboard_writer.WriteText(ASCIIToUTF16("bar"));
+  }
+  ExpectStringInClipboard(ASCIIToUTF16("bar"));
+  // Select and copy web-page content

[battre, 2013/02/12 12:50:59]

nit: . at end of line. Generally I think it looks nice if you have a newline
before a comment.

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

Done.

+  WebContents* web_contents = shell_offtherecord->web_contents();
+  RenderViewHost* view_host = web_contents->GetRenderViewHost();
+  ClipboardWriteObserver clipboard_observer(clipboard(),
+                                            ui::Clipboard::BUFFER_STANDARD);
+  view_host->SelectAll();
+  view_host->Copy();
+  // Run message loop until data have been copied to the clipboard. This happens
+  // on UI thread.
+  clipboard_observer.Wait();
+  ExpectStringInClipboard(ASCIIToUTF16("foo"));
+}
+
+IN_PROC_BROWSER_TEST_F(OffTheRecordClipboardTest, ClearContentData) {
+  EXPECT_FALSE(clipboard()->IsFormatAvailable(
+      ui::Clipboard::GetPlainTextFormatType(), ui::Clipboard::BUFFER_STANDARD));
+}
+
+}  // namespace content