Get rid of extensions dependency from content\browser.

chrome/browser/tabs/pinned_tab_codec.cc

 // 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.
 
 #include "chrome/browser/tabs/pinned_tab_codec.h"
 
 #include "base/values.h"
 #include "chrome/browser/browser_list.h"
+#include "chrome/browser/extensions/extension_tab_helper.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/pref_names.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/common/page_transition_types.h"
 
@@ skipping 17 matching lines @@
 
 // Adds a DictionaryValue to |values| representing the pinned tab at the
 // specified index.
 static void EncodePinnedTab(TabStripModel* model,
                             int index,
                             ListValue* values) {
   scoped_ptr<DictionaryValue> value(new DictionaryValue());
 
   TabContentsWrapper* tab_contents = model->GetTabContentsAt(index);
   if (model->IsAppTab(index)) {
-    const Extension* extension = tab_contents->extension_app();
+    const Extension* extension =
+        tab_contents->extension_tab_helper()->extension_app();
     DCHECK(extension);
     value->SetString(kAppID, extension->id());
     // For apps we use the launch url. We do this for the following reason:
     // . the user is effectively restarting the app, so that returning them to
     //   the app's launch page seems closest to what they expect.
     value->SetString(kURL, extension->GetFullLaunchURL().spec());
     values->Append(value.release());
   } else {
     NavigationEntry* entry = tab_contents->controller().GetActiveEntry();
     if (!entry && tab_contents->controller().entry_count())
@@ skipping 67 matching lines @@
   for (size_t i = 0, max = pref_value->GetSize(); i < max; ++i) {
     DictionaryValue* values = NULL;
     if (pref_value->GetDictionary(i, &values)) {
       Tab tab;
       if (DecodeTab(*values, &tab))
         results.push_back(tab);
     }
   }
   return results;
 }