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

chrome/browser/ui/cocoa/tabs/tab_view_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>
 
 #include "base/mac/scoped_nsobject.h"
-#import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_view.h"
+#import "chrome/browser/ui/cocoa/test/cocoa_test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 namespace {
 
 const float kTabWidth = 50;
 const float kTabHeight = 30;
 
 class TabViewTest : public CocoaTest {
  public:
@@ skipping 47 matching lines @@
   EXPECT_TRUE([view_ hitTest:bottomLeftCorner]);
 
   NSPoint topLeftCorner = NSMakePoint(0, kTabHeight);
   EXPECT_FALSE([view_ hitTest:topLeftCorner]);
 
   NSPoint middle = NSMakePoint(kTabWidth / 2, kTabHeight / 2);
   EXPECT_TRUE([view_ hitTest:middle]);
 }
 
 }  // namespace