Fixes a memory leak in the new tests.

chrome/browser/background/background_contents_service_unittest.cc

 // 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.
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 157 matching lines @@
 #if !defined(OS_CHROMEOS)
     message_center::MessageCenter::Initialize();
 #endif
     profile_manager_.reset(new TestingProfileManager(
         TestingBrowserProcess::GetGlobal()));
     ASSERT_TRUE(profile_manager_->SetUp());
     profile_ = profile_manager_->CreateTestingProfile("Default");
   }
 
   virtual void TearDown() {
+    g_browser_process->notification_ui_manager()->CancelAll();
     profile_manager_.reset();
     profile_ = NULL;
 #if !defined(OS_CHROMEOS)
     message_center::MessageCenter::Shutdown();
 #endif
     BrowserWithTestWindowTest::TearDown();
   }
 
  protected:
   Profile* profile() { return profile_; }
@@ skipping 181 matching lines @@
   // Extension manifest file with no 'icon' field.
   scoped_refptr<extensions::Extension> extension =
       extension_test_util::LoadManifest("app", "manifest.json");
   ASSERT_TRUE(extension.get());
   ASSERT_FALSE(extension->GetManifestData("icons"));
 
   const Notification* notification = CreateCrashNotification(extension);
   EXPECT_FALSE(notification->icon().IsEmpty());
 }
 #endif