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

chrome/browser/printing/background_printing_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/background_printing_manager.h"
 
 #include "chrome/browser/printing/print_job.h"
 #include "chrome/browser/printing/print_preview_tab_controller.h"
 #include "chrome/browser/sessions/restore_tab_helper.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "content/browser/renderer_host/render_view_host.h"
+#include "content/browser/tab_contents/tab_contents.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 
 using content::BrowserThread;
 
 namespace printing {
 
 BackgroundPrintingManager::BackgroundPrintingManager() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
@@ skipping 26 matching lines @@
           content::Source<TabContents>(preview_contents))) {
     registrar_.Add(this, content::NOTIFICATION_TAB_CONTENTS_DESTROYED,
                    content::Source<TabContents>(preview_contents));
   }
 
   // If a tab that is printing crashes, the user cannot destroy it since it is
   // not in any tab strip. Thus listen for crashes here and delete the tab.
   //
   // Multiple sites may share the same RenderProcessHost, so check if this
   // notification has already been added.
-  content::RenderProcessHost* rph = preview_tab->render_view_host()->process();
+  content::RenderProcessHost* rph =
+      preview_tab->tab_contents()->render_view_host()->process();
   if (!registrar_.IsRegistered(this,
                                content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
                                content::Source<content::RenderProcessHost>(
                                   rph))) {
     registrar_.Add(this, content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
                    content::Source<content::RenderProcessHost>(rph));
   }
 
   // Activate the initiator tab.
   PrintPreviewTabController* tab_controller =
@@ skipping 34 matching lines @@
     }
   }
 }
 
 void BackgroundPrintingManager::OnRendererProcessClosed(
     content::RenderProcessHost* rph) {
   TabContentsWrapperSet preview_tabs_pending_deletion;
   TabContentsWrapperSet::const_iterator it;
   for (it = begin(); it != end(); ++it) {
     TabContentsWrapper* preview_tab = *it;
-    if (preview_tab->render_view_host()->process() == rph) {
+    if (preview_tab->tab_contents()->render_view_host()->process() == rph) {
       preview_tabs_pending_deletion.insert(preview_tab);
     }
   }
   for (it = preview_tabs_pending_deletion.begin();
        it != preview_tabs_pending_deletion.end();
        ++it) {
     DeletePreviewTab(*it);
   }
 }
 
@@ skipping 12 matching lines @@
     NOTREACHED();
     return;
   }
 
   // Remove NOTIFICATION_RENDERER_PROCESS_CLOSED if |preview_tab| is the last
   // TabContents associated with |rph|.
   bool shared_rph = HasSharedRenderProcessHost(printing_tabs_, preview_tab) ||
       HasSharedRenderProcessHost(printing_tabs_pending_deletion_, preview_tab);
   if (!shared_rph) {
     content::RenderProcessHost* rph =
-        preview_tab->render_view_host()->process();
+        preview_tab->tab_contents()->render_view_host()->process();
     registrar_.Remove(this, content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
                       content::Source<content::RenderProcessHost>(rph));
   }
 
   // Remove other notifications and remove the tab from its
   // TabContentsWrapperSet.
   if (printing_tabs_.find(preview_tab) != printing_tabs_.end()) {
     registrar_.Remove(this, chrome::NOTIFICATION_PRINT_JOB_RELEASED,
                       content::Source<TabContentsWrapper>(preview_tab));
     printing_tabs_.erase(preview_tab);
   } else {
     // DeletePreviewTab already deleted the notification.
     printing_tabs_pending_deletion_.erase(preview_tab);
   }
 }
 
 void BackgroundPrintingManager::DeletePreviewTab(TabContentsWrapper* tab) {
   registrar_.Remove(this, chrome::NOTIFICATION_PRINT_JOB_RELEASED,
                     content::Source<TabContentsWrapper>(tab));
   printing_tabs_.erase(tab);
   printing_tabs_pending_deletion_.insert(tab);
   MessageLoop::current()->DeleteSoon(FROM_HERE, tab);
 }
 
 bool BackgroundPrintingManager::HasSharedRenderProcessHost(
     const TabContentsWrapperSet& set,
     TabContentsWrapper* tab) {
-  content::RenderProcessHost* rph = tab->render_view_host()->process();
+  content::RenderProcessHost* rph =
+      tab->tab_contents()->render_view_host()->process();
   for (TabContentsWrapperSet::const_iterator it = set.begin();
        it != set.end();
        ++it) {
     TabContentsWrapper* iter_tab = *it;
     if ((iter_tab != tab) &&
-        (iter_tab->render_view_host()->process() == rph)) {
+        (iter_tab->tab_contents()->render_view_host()->process() == rph)) {
       return true;
     }
   }
   return false;
 }
 
 BackgroundPrintingManager::TabContentsWrapperSet::const_iterator
     BackgroundPrintingManager::begin() {
   return printing_tabs_.begin();
 }
 
 BackgroundPrintingManager::TabContentsWrapperSet::const_iterator
     BackgroundPrintingManager::end() {
   return printing_tabs_.end();
 }
 
 bool BackgroundPrintingManager::HasPrintPreviewTab(
     TabContentsWrapper* preview_tab) {
   if (printing_tabs_.find(preview_tab) != printing_tabs_.end())
     return true;
   return printing_tabs_pending_deletion_.find(preview_tab) !=
       printing_tabs_pending_deletion_.end();
 }
 
 }  // namespace printing