Move TabStripModelDelegate off Browser into its own class.

chrome/chrome_browser.gypi

 # Copyright (c) 2012 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
@@ skipping 2403 matching lines @@
         'browser/ui/browser_list.cc',
         'browser/ui/browser_list.h',
         'browser/ui/browser_mac.cc',
         'browser/ui/browser_mac.h',
         'browser/ui/browser_navigator.cc',
         'browser/ui/browser_navigator.h',
         'browser/ui/browser_ui_prefs.cc',
         'browser/ui/browser_ui_prefs.h',
         'browser/ui/browser_tab_restore_service_delegate.cc',
         'browser/ui/browser_tab_restore_service_delegate.h',
+        'browser/ui/browser_tab_strip_model_delegate.cc',
+        'browser/ui/browser_tab_strip_model_delegate.h',
         'browser/ui/browser_tabrestore.cc',
         'browser/ui/browser_tabrestore.h',
         'browser/ui/browser_tabstrip.cc',
         'browser/ui/browser_tabstrip.h',
         'browser/ui/browser_toolbar_model_delegate.cc',
         'browser/ui/browser_toolbar_model_delegate.h',
         'browser/ui/browser_view_prefs.cc',
         'browser/ui/browser_view_prefs.h',
         'browser/ui/browser_win.cc',
         'browser/ui/browser_window.h',
@@ skipping 2936 matching lines @@
         'browser/metrics/proto/study.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/metrics/proto',
         'proto_out_dir': 'chrome/browser/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }