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

chrome/browser/ui/cocoa/screen_capture_notification_ui_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/screen_capture_notification_ui_cocoa.h"
 
 #include "base/bind.h"
 #include "base/mac/mac_util.h"
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
-#include "chrome/browser/ui/cocoa/cocoa_test_helper.h"
+#include "chrome/browser/ui/cocoa/test/cocoa_test_helper.h"
 
 @interface ScreenCaptureNotificationController (ExposedForTesting)
 - (NSButton*)stopButton;
 - (NSButton*)minimizeButton;
 @end
 
 @implementation ScreenCaptureNotificationController (ExposedForTesting)
 - (NSButton*)stopButton {
   return stopButton_;
 }
@@ skipping 97 matching lines @@
       new ScreenCaptureNotificationUICocoa(base::UTF8ToUTF16("Title")));
   target_->OnStarted(
       base::Bind(&ScreenCaptureNotificationUICocoaTest::StopCallback,
                  base::Unretained(this)));
 
   [[controller() minimizeButton] performClick:nil];
 
   EXPECT_EQ(0, callback_called_);
   EXPECT_TRUE([[controller() window] isMiniaturized]);
 }