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

chrome/browser/ui/webui/print_preview_ui.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/ui/webui/print_preview_ui.h"
 
 #include <map>
 
 #include "base/lazy_instance.h"
 #include "base/metrics/histogram.h"
@@ skipping 108 matching lines @@
     const std::string& initiator_url,
     const string16& job_title) {
   initiator_url_ = initiator_url;
   initiator_tab_title_ = job_title;
 }
 
 // static
 void PrintPreviewUI::SetSourceIsModifiable(
     TabContentsWrapper* print_preview_tab,
     bool source_is_modifiable) {
-  if (!print_preview_tab || !print_preview_tab->web_ui())
+  if (!print_preview_tab || !print_preview_tab->tab_contents()->web_ui())
     return;
   PrintPreviewUI* print_preview_ui =
-      static_cast<PrintPreviewUI*>(print_preview_tab->web_ui());
+      static_cast<PrintPreviewUI*>(print_preview_tab->tab_contents()->web_ui());
   print_preview_ui->source_is_modifiable_ = source_is_modifiable;
 }
 
 // static
 void PrintPreviewUI::GetCurrentPrintPreviewStatus(
     const std::string& preview_ui_addr,
     int request_id,
     bool* cancel) {
   int current_id = -1;
   if (!g_print_preview_request_id_map.Get().Get(preview_ui_addr, &current_id)) {
@@ skipping 150 matching lines @@
   ConstrainedHtmlUIDelegate* delegate = GetConstrainedDelegate();
   if (!delegate)
     return;
   delegate->GetHtmlDialogUIDelegate()->OnDialogClosed("");
   delegate->OnDialogCloseFromWebUI();
 }
 
 void PrintPreviewUI::OnReloadPrintersList() {
   CallJavascriptFunction("reloadPrintersList");
 }