Move TitleWatcher from ui_test_utils.h to browser_test_utils.h so it can be reused by content_brows…

content/public/test/browser_test_utils.h

 // Copyright (c) 2012 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_BROWSER_TEST_UTILS_H_
 #define CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_
 
+#include <vector>
+
 #include "base/callback_forward.h"
+#include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"
+#include "base/string16.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
 #include "googleurl/src/gurl.h"
 
 namespace base {
 class RunLoop;
 }
 
 // A collections of functions designed for use with content_browsertests and
 // browser_tests.
 // TO BE CLEAR: any function here must work against both binaries. If it only
 // works with browser_tests, it should be in chrome\test\base\ui_test_utils.h.
 // If it only works with content_browsertests, it should be in
 // content\test\content_browser_test_utils.h.
 
 namespace content {
 
+class MessageLoopRunner;
+class WebContents;
+
+// Watches title changes on a tab, blocking until an expected title is set.
+class TitleWatcher : public NotificationObserver {
+ public:
+  // |web_contents| must be non-NULL and needs to stay alive for the
+  // entire lifetime of |this|. |expected_title| is the title that |this|
+  // will wait for.
+  TitleWatcher(WebContents* web_contents,
+               const string16& expected_title);
+  virtual ~TitleWatcher();
+
+  // Adds another title to watch for.
+  void AlsoWaitForTitle(const string16& expected_title);
+
+  // Waits until the title matches either expected_title or one of the titles
+  // added with  AlsoWaitForTitle.  Returns the value of the most recently
+  // observed matching title.
+  const string16& WaitAndGetTitle() WARN_UNUSED_RESULT;
+
+ private:
+  // NotificationObserver
+  virtual void Observe(int type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details) OVERRIDE;
+
+  WebContents* web_contents_;
+  std::vector<string16> expected_titles_;
+  NotificationRegistrar notification_registrar_;
+  scoped_refptr<MessageLoopRunner> message_loop_runner_;
+
+  // The most recently observed expected title, if any.
+  string16 observed_title_;
+
+  bool expected_title_observed_;
+  bool quit_loop_on_observation_;
+
+  DISALLOW_COPY_AND_ASSIGN(TitleWatcher);
+};
+
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_