Clean up TCW, make it solely a hub for 1:1 observer/helper objects.

chrome/browser/printing/print_view_manager.cc

 // Copyright (c) 2011 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/printing/print_view_manager.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
@@ skipping 84 matching lines @@
 
 bool PrintViewManager::AdvancedPrintNow() {
   PrintPreviewTabController* tab_controller =
       PrintPreviewTabController::GetInstance();
   if (!tab_controller)
     return false;
   TabContentsWrapper* print_preview_tab =
       tab_controller->GetPrintPreviewForTab(tab_);
   if (print_preview_tab) {
     // Preview tab exist for current tab or current tab is preview tab.
-    if (!print_preview_tab->web_ui())
+    if (!print_preview_tab->tab_contents()->web_ui())
       return false;
-    PrintPreviewUI* print_preview_ui =
-        static_cast<PrintPreviewUI*>(print_preview_tab->web_ui());
+    PrintPreviewUI* print_preview_ui = static_cast<PrintPreviewUI*>(
+        print_preview_tab->tab_contents()->web_ui());
     print_preview_ui->OnShowSystemDialog();
     return true;
   } else {
     return PrintNow();
   }
 }
 
 bool PrintViewManager::PrintPreviewNow() {
   if (print_preview_state_ != NOT_PREVIEWING) {
     NOTREACHED();
@@ skipping 475 matching lines @@
 }
 
 bool PrintViewManager::PrintNowInternal(IPC::Message* message) {
   // Don't print / print preview interstitials.
   if (tab_contents()->showing_interstitial_page())
     return false;
   return Send(message);
 }
 
 }  // namespace printing