Allow secondary tiles to be unpinned.

chrome/browser/ui/tab_contents/tab_contents.cc

 // 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.
 
 #include "chrome/browser/ui/tab_contents/tab_contents.h"
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "chrome/browser/autocomplete_history_manager.h"
 #include "chrome/browser/autofill/autofill_external_delegate.h"
@@ skipping 19 matching lines @@
 #include "chrome/browser/tab_contents/tab_contents_ssl_helper.h"
 #include "chrome/browser/tab_contents/thumbnail_generator.h"
 #include "chrome/browser/translate/translate_tab_helper.h"
 #include "chrome/browser/ui/alternate_error_tab_observer.h"
 #include "chrome/browser/ui/blocked_content/blocked_content_tab_helper.h"
 #include "chrome/browser/ui/bookmarks/bookmark_tab_helper.h"
 #include "chrome/browser/ui/constrained_window_tab_helper.h"
 #include "chrome/browser/ui/find_bar/find_tab_helper.h"
 #include "chrome/browser/ui/hung_plugin_tab_helper.h"
 #include "chrome/browser/ui/intents/web_intent_picker_controller.h"
+#include "chrome/browser/ui/metro_pin_tab_helper.h"
 #include "chrome/browser/ui/pdf/pdf_tab_observer.h"
 #include "chrome/browser/ui/prefs/prefs_tab_helper.h"
 #include "chrome/browser/ui/sad_tab_helper.h"
 #include "chrome/browser/ui/search/search.h"
 #include "chrome/browser/ui/search/search_tab_helper.h"
 #include "chrome/browser/ui/search_engines/search_engine_tab_helper.h"
 #include "chrome/browser/ui/snapshot_tab_helper.h"
 #include "chrome/browser/ui/sync/one_click_signin_helper.h"
 #include "chrome/browser/ui/sync/tab_contents_synced_tab_delegate.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper.h"
@@ skipping 51 matching lines @@
       new captive_portal::CaptivePortalTabHelper(profile(), web_contents()));
 #endif
   constrained_window_tab_helper_.reset(new ConstrainedWindowTabHelper(this));
   core_tab_helper_.reset(new CoreTabHelper(contents));
   extension_tab_helper_.reset(new extensions::TabHelper(this));
   favicon_tab_helper_.reset(new FaviconTabHelper(contents));
   find_tab_helper_.reset(new FindTabHelper(contents));
   history_tab_helper_.reset(new HistoryTabHelper(contents));
   hung_plugin_tab_helper_.reset(new HungPluginTabHelper(contents));
   infobar_tab_helper_.reset(new InfoBarTabHelper(contents));
+  metro_pin_tab_helper_.reset(new MetroPinTabHelper(contents));
   password_manager_delegate_.reset(new PasswordManagerDelegateImpl(this));
   password_manager_.reset(
       new PasswordManager(contents, password_manager_delegate_.get()));
   prefs_tab_helper_.reset(new PrefsTabHelper(contents));
   prerender_tab_helper_.reset(new prerender::PrerenderTabHelper(this));
   restore_tab_helper_.reset(new RestoreTabHelper(contents));
   search_engine_tab_helper_.reset(new SearchEngineTabHelper(contents));
   bool is_search_enabled =
       chrome::search::IsInstantExtendedAPIEnabled(profile());
   search_tab_helper_.reset(
@@ skipping 113 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // WebContentsObserver overrides
 
 void TabContents::WebContentsDestroyed(WebContents* tab) {
   // Destruction of the WebContents should only be done by us from our
   // destructor. Otherwise it's very likely we (or one of the helpers we own)
   // will attempt to access the WebContents and we'll crash.
   DCHECK(in_destructor_);
 }