Extract minimal RenderViewHost interface for embedders, leaving

chrome/browser/printing/background_printing_manager.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/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"
@@ skipping 62 matching lines @@
 
   // Activate the initiator tab.
   PrintPreviewTabController* tab_controller =
       PrintPreviewTabController::GetInstance();
   if (!tab_controller)
     return;
   TabContentsWrapper* initiator_tab =
       tab_controller->GetInitiatorTab(preview_tab);
   if (!initiator_tab)
     return;
-  initiator_tab->web_contents()->GetRenderViewHost()->delegate()->Activate();
+  initiator_tab->web_contents()->GetRenderViewHost()->GetDelegate()->Activate();
 }
 
 void BackgroundPrintingManager::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   switch (type) {
     case content::NOTIFICATION_RENDERER_PROCESS_CLOSED: {
       OnRendererProcessClosed(
           content::Source<content::RenderProcessHost>(source).ptr());
@@ skipping 108 matching lines @@
 
 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