[Mac] Organize all tab/tab strip files into chrome/browser/ui/cocoa/tabs/....

chrome/browser/ui/cocoa/side_tab_strip_controller.h

Index: chrome/browser/ui/cocoa/side_tab_strip_controller.h
===================================================================
--- chrome/browser/ui/cocoa/side_tab_strip_controller.h	(revision 71805)
+++ chrome/browser/ui/cocoa/side_tab_strip_controller.h	(working copy)
@@ -1,19 +0,0 @@
-// Copyright (c) 2010 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/tab_strip_controller.h"
-
-// A controller for the tab strip when side tabs are enabled.
-//
-// TODO(pinkerton): I'm expecting there are more things here that need
-// overriding rather than just tweaking a couple of settings, so I'm creating
-// a full-blown subclass. Clearly, very little is actually necessary at this
-// point for it to work.
-
-@interface SideTabStripController : TabStripController {
-}
-
-@end