Add PrerenderUnload browser test

chrome/test/ui_test_utils.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 "chrome/test/ui_test_utils.h"
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 871 matching lines @@
   if (waiting_for_ == source ||
       (running_ && waiting_for_ == NotificationService::AllSources())) {
     seen_ = true;
     if (running_)
       MessageLoopForUI::current()->Quit();
   } else {
     sources_seen_.insert(source.map_key());
   }
 }
 
+TitleWatcher::TitleWatcher(TabContents* tab_contents,
+                           const string16& expected_title)
+    : expected_tab_(tab_contents),
+      expected_title_(expected_title),
+      title_observed_(false),
+      quit_loop_on_observation_(false) {
+  EXPECT_TRUE(tab_contents != NULL);
+  notification_registrar_.Add(this,
+                              NotificationType::TAB_CONTENTS_TITLE_UPDATED,
+                              Source<TabContents>(tab_contents));
+}
+
+TitleWatcher::~TitleWatcher() {
+}
+
+bool TitleWatcher::Wait() {
+  if (title_observed_)
+    return true;
+  quit_loop_on_observation_ = true;
+  ui_test_utils::RunMessageLoop();
+  return title_observed_;
+}
+
+void TitleWatcher::Observe(NotificationType type,
+                           const NotificationSource& source,
+                           const NotificationDetails& details) {
+  if (type != NotificationType::TAB_CONTENTS_TITLE_UPDATED)
+    return;
+
+  TabContents* source_contents = Source<TabContents>(source).ptr();
+  ASSERT_EQ(expected_tab_, source_contents);
+  if (source_contents->GetTitle() != expected_title_)
+    return;
+
+  title_observed_ = true;
+  if (quit_loop_on_observation_)
+    MessageLoopForUI::current()->Quit();
+}
+
 DOMMessageQueue::DOMMessageQueue() {
   registrar_.Add(this, NotificationType::DOM_OPERATION_RESPONSE,
                  NotificationService::AllSources());
 }
 
 DOMMessageQueue::~DOMMessageQueue() {}
 
 void DOMMessageQueue::Observe(NotificationType type,
                               const NotificationSource& source,
                               const NotificationDetails& details) {
@@ skipping 92 matching lines @@
   return taker.TakeRenderWidgetSnapshot(rwh, page_size, page_size, bitmap);
 }
 
 bool TakeEntirePageSnapshot(RenderViewHost* rvh, SkBitmap* bitmap) {
   DCHECK(bitmap);
   SnapshotTaker taker;
   return taker.TakeEntirePageSnapshot(rvh, bitmap);
 }
 
 }  // namespace ui_test_utils