Create c/b/ui/cocoa/test and move test files to there

chrome/browser/ui/cocoa/tabs/alert_indicator_button_cocoa_unittest.mm

 // Copyright 2013 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 "chrome/browser/ui/cocoa/tabs/alert_indicator_button_cocoa.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/message_loop/message_loop.h"
-#import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
+#import "chrome/browser/ui/cocoa/test/cocoa_test_helper.h"
 #include "chrome/common/chrome_switches.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 // A simple target to confirm an action was invoked.
 @interface AlertIndicatorButtonTestTarget : NSObject {
  @private
   int count_;
 }
 @property(readonly, nonatomic) int count;
@@ skipping 58 matching lines @@
     EXPECT_EQ(2, [clickTarget count]);
   }
 
   base::scoped_nsobject<AlertIndicatorButton> button_;
   base::MessageLoopForUI message_loop_;  // Needed for gfx::Animation.
 };
 
 TEST_VIEW(AlertIndicatorButtonTest, button_)
 
 }  // namespace