Break apart the TabModelBase's JNI calls into its own class

chrome/chrome_browser_ui.gypi

 # Copyright 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.
 
 {
   'variables': {
     'chrome_browser_ui_non_ios_sources': [
       'browser/ui/accelerator_utils.h',
       'browser/ui/android/android_about_app_info.cc',
       'browser/ui/android/android_about_app_info.h',
@@ skipping 37 matching lines @@
       'browser/ui/android/simple_message_box_android.cc',
       'browser/ui/android/ssl_client_certificate_request.cc',
       'browser/ui/android/ssl_client_certificate_request.h',
       'browser/ui/android/status_tray_android.cc',
       'browser/ui/android/tab_contents/chrome_web_contents_view_delegate_android.cc',
       'browser/ui/android/tab_contents/chrome_web_contents_view_delegate_android.h',
       'browser/ui/android/tab_model/tab_model.cc',
       'browser/ui/android/tab_model/tab_model.h',
       'browser/ui/android/tab_model/tab_model_base.cc',
       'browser/ui/android/tab_model/tab_model_base.h',
+      'browser/ui/android/tab_model/tab_model_jni_bridge.cc',
+      'browser/ui/android/tab_model/tab_model_jni_bridge.h',
       'browser/ui/android/tab_model/tab_model_list.cc',
       'browser/ui/android/tab_model/tab_model_list.h',
       'browser/ui/android/toolbar/toolbar_model_android.cc',
       'browser/ui/android/toolbar/toolbar_model_android.h',
       'browser/ui/android/tab_restore_service_delegate_android.cc',
       'browser/ui/android/website_settings_popup_android.cc',
       'browser/ui/android/website_settings_popup_android.h',
       'browser/ui/android/website_settings_popup_legacy_android.cc',
       'browser/ui/android/website_settings_popup_legacy_android.h',
       'browser/ui/android/window_android_helper.cc',
@@ skipping 2926 matching lines @@
         }],
         ['OS!="android" and OS!="ios"', {
           'dependencies': [
             '../device/bluetooth/bluetooth.gyp:device_bluetooth',
           ],
         }],
       ],
     },
   ],
 }