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

chrome/browser/ui/cocoa/toolbar/reload_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 "chrome/browser/ui/cocoa/toolbar/reload_button_cocoa.h"
 
 #include "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/image_button_cell.h"
+#import "chrome/browser/ui/cocoa/test/cocoa_test_helper.h"
 #import "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 #import "ui/events/test/cocoa_test_event_utils.h"
 
 @interface ReloadButton (Testing)
 + (void)setPendingReloadTimeout:(NSTimeInterval)seconds;
 @end
 
 @interface ReloadButtonTarget : NSObject
@@ skipping 247 matching lines @@
   EXPECT_EQ(IDC_STOP, [button_ tag]);
   EXPECT_FALSE([button_ isEnabled]);
   [NSApp postEvent:click.second atStart:YES];
   [button_ mouseDown:click.first];
   EXPECT_EQ(IDC_STOP, [button_ tag]);
 
   [button_ setTarget:nil];
 }
 
 }  // namespace