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

base/mac/scoped_sending_event_unittest.mm

 // 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.
 
 #import "base/mac/scoped_sending_event.h"
 
+#import <Foundation/Foundation.h>
+
+#include "base/mac/scoped_nsobject.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+@interface ScopedSendingEventTestCrApp : NSObject <CrAppControlProtocol> {
+ @private
+  BOOL handlingSendEvent_;
+}
+@property(nonatomic, assign, getter=isHandlingSendEvent) BOOL handlingSendEvent;
+@end
+
+@implementation ScopedSendingEventTestCrApp
+@synthesize handlingSendEvent = handlingSendEvent_;
+@end
+
 namespace {
 
+class ScopedSendingEventTest : public testing::Test {
+ public:
+  ScopedSendingEventTest() : app_([[ScopedSendingEventTestCrApp alloc] init]) {
+    NSApp = app_.get();
+  }
+  virtual ~ScopedSendingEventTest() {
+    NSApp = nil;
+  }
+
+ private:
+  base::scoped_nsobject<ScopedSendingEventTestCrApp> app_;
+};
+
 // Sets the flag within scope, resets when leaving scope.
-TEST(ScopedSendingEventTest, SetHandlingSendEvent) {
+TEST_F(ScopedSendingEventTest, SetHandlingSendEvent) {
   id<CrAppProtocol> app = NSApp;
   EXPECT_FALSE([app isHandlingSendEvent]);
   {
     base::mac::ScopedSendingEvent is_handling_send_event;
     EXPECT_TRUE([app isHandlingSendEvent]);
   }
   EXPECT_FALSE([app isHandlingSendEvent]);
 }
 
 // Nested call restores previous value rather than resetting flag.
-TEST(ScopedSendingEventTest, NestedSetHandlingSendEvent) {
+TEST_F(ScopedSendingEventTest, NestedSetHandlingSendEvent) {
   id<CrAppProtocol> app = NSApp;
   EXPECT_FALSE([app isHandlingSendEvent]);
   {
     base::mac::ScopedSendingEvent is_handling_send_event;
     EXPECT_TRUE([app isHandlingSendEvent]);
     {
       base::mac::ScopedSendingEvent nested_is_handling_send_event;
       EXPECT_TRUE([app isHandlingSendEvent]);
     }
     EXPECT_TRUE([app isHandlingSendEvent]);
   }
   EXPECT_FALSE([app isHandlingSendEvent]);
 }
 
 }  // namespace