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

chrome/browser/ui/webui/print_preview_handler.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_handler.h"
 
 #include <ctype.h>
 
 #include <string>
 #include <vector>
@@ skipping 290 matching lines @@
   // headers and footers are to be displayed.
   bool display_header_footer = false;
   if (!settings->GetBoolean(printing::kSettingHeaderFooterEnabled,
                             &display_header_footer)) {
     NOTREACHED();
   }
   if (display_header_footer) {
     settings->SetString(printing::kSettingHeaderFooterTitle,
                         initiator_tab->tab_contents()->GetTitle());
     std::string url;
-    NavigationEntry* entry = initiator_tab->controller().GetActiveEntry();
+    NavigationEntry* entry =
+        initiator_tab->tab_contents()->controller().GetActiveEntry();
     if (entry)
       url = entry->virtual_url().spec();
     settings->SetString(printing::kSettingHeaderFooterURL, url);
   }
 
   bool generate_draft_data = false;
   bool success = settings->GetBoolean(printing::kSettingGenerateDraftData,
                                       &generate_draft_data);
   DCHECK(success);
 
   if (!generate_draft_data) {
     double draft_page_count_double = -1;
     success = args->GetDouble(1, &draft_page_count_double);
     DCHECK(success);
     int draft_page_count = static_cast<int>(draft_page_count_double);
 
     bool preview_modifiable = false;
     success = args->GetBoolean(2, &preview_modifiable);
     DCHECK(success);
 
     if (draft_page_count != -1 && preview_modifiable &&
         print_preview_ui->GetAvailableDraftPageCount() != draft_page_count) {
       settings->SetBoolean(printing::kSettingGenerateDraftData, true);
     }
   }
 
   VLOG(1) << "Print preview request start";
-  RenderViewHost* rvh = initiator_tab->render_view_host();
+  RenderViewHost* rvh = initiator_tab->tab_contents()->render_view_host();
   rvh->Send(new PrintMsg_PrintPreview(rvh->routing_id(), *settings));
 }
 
 void PrintPreviewHandler::HandlePrint(const ListValue* args) {
   ReportStats();
 
   // Record the number of times the user requests to regenerate preview data
   // before printing.
   UMA_HISTOGRAM_COUNTS("PrintPreview.RegeneratePreviewRequest.BeforePrint",
                        regenerate_preview_request_count_);
 
   TabContentsWrapper* initiator_tab = GetInitiatorTab();
   CHECK(initiator_tab);
 
-  RenderViewHost* init_rvh = initiator_tab->render_view_host();
+  RenderViewHost* init_rvh = initiator_tab->tab_contents()->render_view_host();
   init_rvh->Send(new PrintMsg_ResetScriptedPrintCount(init_rvh->routing_id()));
 
   scoped_ptr<DictionaryValue> settings(GetSettingsDictionary(args));
   if (!settings.get())
     return;
 
   // Storing last used color model.
   int color_model;
   if (!settings->GetInteger(printing::kSettingColor, &color_model))
     color_model = printing::GRAY;
@@ skipping 472 matching lines @@
     return;
 
   // We no longer require the initiator tab details. Remove those details
   // associated with the preview tab to allow the initiator tab to create
   // another preview tab.
   printing::PrintPreviewTabController* tab_controller =
       printing::PrintPreviewTabController::GetInstance();
   if (tab_controller)
     tab_controller->EraseInitiatorTabInfo(preview_tab_wrapper());
 }