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

chrome/browser/ui/cocoa/toolbar/toolbar_button_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 <Cocoa/Cocoa.h>
 
 #import "base/mac/scoped_nsobject.h"
 #include "chrome/app/chrome_command_ids.h"
-#import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
+#import "chrome/browser/ui/cocoa/test/cocoa_test_helper.h"
 #import "chrome/browser/ui/cocoa/toolbar/toolbar_button_cocoa.h"
 #import "testing/gtest_mac.h"
 #import "ui/events/test/cocoa_test_event_utils.h"
 
 @interface TestableToolbarButton : ToolbarButton {
  @private
   NSInteger numOfClick_;
   NSInteger lastCommand_;
 }
 
@@ skipping 283 matching lines @@
   [NSApp postEvent:left_up_in_view atStart:YES];
   [NSApp postEvent:left_down_in_view atStart:YES];
   [button_ otherMouseDown:other_down_in_view];
 
   EXPECT_EQ(NSOffState, [button_ state]);
   EXPECT_EQ(1, [button_ numOfClick]);
   EXPECT_EQ(IDC_HOME, [button_ lastCommand]);
 }
 
 }  // namespace