[Mac] Do not initialize the MockCrApplication in base::TestSuite.

ui/gfx/test/ui_cocoa_test_helper.mm

 // Copyright 2014 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 "ui/gfx/test/ui_cocoa_test_helper.h"
 
 #include "base/debug/debugger.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
+#include "base/test/mock_chrome_application_mac.h"
 #include "base/test/test_timeouts.h"
 
 namespace {
 
 // Some AppKit function leak intentionally, e.g. for caching purposes.
 // Force those leaks here, so there can be a unique calling path, allowing
 // to flag intentional leaks without having to suppress all calls to
 // potentially leaky functions.
 void NOINLINE ForceSystemLeaks() {
+  // If a test suite hasn't already initialized NSApp, register the mock one
+  // now.
+  if (!NSApp)
+    mock_cr_app::RegisterMockCrApp();
+
   // First NSCursor push always leaks.
   [[NSCursor openHandCursor] push];
   [NSCursor pop];
 }
 
 }  // namespace.
 
 @implementation CocoaTestHelperWindow
 
 - (id)initWithContentRect:(NSRect)contentRect {
@@ skipping 177 matching lines @@
     if (base::debug::BeingDebugged()) {
       [test_window_ orderFront:nil];
     } else {
       [test_window_ orderBack:nil];
     }
   }
   return test_window_;
 }
 
 }  // namespace ui