Cleanup: Stop creating RenderViewObservers from chrome/ in RenderViewer.

chrome/renderer/print_web_view_helper.h

Index: chrome/renderer/print_web_view_helper.h
===================================================================
--- chrome/renderer/print_web_view_helper.h	(revision 80513)
+++ chrome/renderer/print_web_view_helper.h	(working copy)
@@ -10,6 +10,7 @@
 #include "base/shared_memory.h"
 #include "base/time.h"
 #include "content/renderer/render_view_observer.h"
+#include "content/renderer/render_view_observer_tracker.h"
 #include "printing/native_metafile.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrameClient.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebViewClient.h"
@@ -69,15 +70,13 @@
 // We plan on making print asynchronous and that will require copying the DOM
 // of the document and creating a new WebView with the contents.
 class PrintWebViewHelper : public RenderViewObserver ,
+                           public RenderViewObserverTracker<PrintWebViewHelper>,
                            public WebKit::WebViewClient,
                            public WebKit::WebFrameClient {
  public:
   explicit PrintWebViewHelper(RenderView* render_view);
   virtual ~PrintWebViewHelper();
 
-  // Prints |frame| which called window.print().
-  void ScriptInitiatedPrint(WebKit::WebFrame* frame);
-
  protected:
   // WebKit::WebViewClient override:
   virtual void didStopLoading();
@@ -93,6 +92,7 @@
 
   // RenderViewObserver implementation.
   virtual bool OnMessageReceived(const IPC::Message& message);
+  virtual void printPage(WebKit::WebFrame* frame);
 
   // Message handlers ---------------------------------------------------------