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

chrome/browser/ui/cocoa/content_settings/collected_cookies_mac_unittest.mm

 // Copyright 2014 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/content_settings/collected_cookies_mac.h"
 
 #include "base/mac/scoped_nsobject.h"
-#include "chrome/browser/ui/cocoa/cocoa_test_helper.h"
+#include "chrome/browser/ui/cocoa/test/cocoa_test_helper.h"
 #import "testing/gtest_mac.h"
 
 class CollectedCookiesMacTest : public CocoaTest {
  public:
   NSTreeNode* CreateTreeNodesFromDictionary(NSDictionary* dict) {
     base::scoped_nsobject<NSTreeNode> root(
         [[NSTreeNode alloc] initWithRepresentedObject:nil]);
     AttachTreeNodeChildren(root, dict);
     return root.autorelease();
   }
@@ skipping 37 matching lines @@
   actual =
       [CollectedCookiesWindowController normalizeNodeSelection:selection];
   EXPECT_NSEQ(normalized, actual);
 
   selection = @[ one, one1, one1a, one1b ];
   normalized = @[ one ];
   actual =
       [CollectedCookiesWindowController normalizeNodeSelection:selection];
   EXPECT_NSEQ(normalized, actual);
 }