Extract minimal RenderViewHost interface for embedders, leaving

chrome/browser/printing/print_preview_tab_controller.cc

Index: chrome/browser/printing/print_preview_tab_controller.cc
diff --git a/chrome/browser/printing/print_preview_tab_controller.cc b/chrome/browser/printing/print_preview_tab_controller.cc
index 2a67366bd7362166f151241d6869730fbc0ffc8a..464e64bfc34cd682971d91564d87e0ceab9c21a4 100644
--- a/chrome/browser/printing/print_preview_tab_controller.cc
+++ b/chrome/browser/printing/print_preview_tab_controller.cc
@@ -50,7 +50,7 @@ void EnableInternalPDFPluginForTab(TabContentsWrapper* preview_tab) {
   // Always enable the internal PDF plugin for the print preview page.
   ChromePluginServiceFilter::GetInstance()->OverridePluginForTab(
         preview_tab->web_contents()->GetRenderProcessHost()->GetID(),
-        preview_tab->web_contents()->GetRenderViewHost()->routing_id(),
+        preview_tab->web_contents()->GetRenderViewHost()->GetRoutingID(),
         GURL(),
         ASCIIToUTF16(chrome::ChromeContentClient::kPDFPluginName));
 }
@@ -228,7 +228,7 @@ TabContentsWrapper* PrintPreviewTabController::GetOrCreatePreviewTab(
     return CreatePrintPreviewTab(initiator_tab);
 
   // Show the initiator tab holding the existing preview tab.
-  initiator_tab->web_contents()->GetRenderViewHost()->delegate()->Activate();
+  initiator_tab->web_contents()->GetRenderViewHost()->GetDelegate()->Activate();
   return preview_tab;
 }