Remove CrApplication dependency from base

base/test/mock_chrome_application_mac.h

+// Copyright (c) 2010 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 BASE_TEST_MOCK_CHROME_APPLICATION_MAC_H_
+#define BASE_TEST_MOCK_CHROME_APPLICATION_MAC_H_
+#pragma once
+
+#if defined(__OBJC__)
+
+#import <AppKit/AppKit.h>
+
+#include "base/message_pump_mac.h"
+
+// A mock implementation of CrAppProtocol that claims that -sendEvent: is never
+// on the stack. This can be used in tests that need an NSApplication and use a
+// runloop, but don't run nested message loops.
+@interface MockCrApp : NSApplication<CrAppProtocol>
+@end
+
+#endif
+
+// To be used to instantiate MockCrApp from C++ code.
+namespace mock_cr_app {
+void RegisterMockCrApp();
+}  // namespace mock_cr_app
+
+#endif  // BASE_TEST_MOCK_CHROME_APPLICATION_MAC_H_