GTTF: Use a fresh TestingBrowserProcess for each test, part #1

chrome/browser/app_controller_mac_unittest.mm

 // Copyright (c) 2009 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/scoped_nsobject.h"
 #include "chrome/app/chrome_command_ids.h"
 #import "chrome/browser/app_controller_mac.h"
+#include "chrome/test/testing_browser_process.h"
 #include "testing/platform_test.h"
 
 class AppControllerTest : public PlatformTest {
+ private:
+  ScopedTestingBrowserProcess browser_process_;
 };
 
 TEST_F(AppControllerTest, DockMenu) {
   scoped_nsobject<AppController> ac([[AppController alloc] init]);
   NSMenu* menu = [ac applicationDockMenu:NSApp];
   NSMenuItem* item;
 
   EXPECT_TRUE(menu);
   EXPECT_NE(-1, [menu indexOfItemWithTag:IDC_NEW_WINDOW]);
   EXPECT_NE(-1, [menu indexOfItemWithTag:IDC_NEW_INCOGNITO_WINDOW]);
   for (item in [menu itemArray]) {
     EXPECT_EQ(ac.get(), [item target]);
     EXPECT_EQ(@selector(commandFromDock:), [item action]);
   }
 }