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

chrome/browser/ui/cocoa/find_bar/find_bar_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/find_bar/find_bar_view_cocoa.h"
+#import "chrome/browser/ui/cocoa/test/cocoa_test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 #include "ui/events/test/cocoa_test_event_utils.h"
 
 @interface MouseDownViewPong : NSView {
   BOOL pong_;
 }
 @property (nonatomic, assign) BOOL pong;
 @end
 
@@ skipping 61 matching lines @@
   // a few pixels from the lower left corner of the window, which places it in
   // the transparent area surrounding the findbar.
   NSPoint pointInTransparentArea = NSMakePoint(2, 2);
   [pongView setPong:NO];
   [test_window() sendEvent:
       cocoa_test_event_utils::LeftMouseDownAtPoint(pointInTransparentArea)];
   // Click is ignored by findbar, passed through to underlying view.
   EXPECT_TRUE([pongView pong]);
 }
 }  // namespace