Cleanup: Stop creating RenderViewObservers from chrome/ in RenderViewer.

content/renderer/render_view_observer.h

Index: content/renderer/render_view_observer.h
===================================================================
--- content/renderer/render_view_observer.h	(revision 79652)
+++ content/renderer/render_view_observer.h	(working copy)
@@ -14,6 +14,8 @@
 namespace WebKit {
 class WebFrame;
 class WebMouseEvent;
+class WebString;
+class WebTextCheckingCompletion;
 struct WebURLError;
 }
 
@@ -39,13 +41,19 @@
   virtual void FrameDetached(WebKit::WebFrame* frame) {}
   virtual void FrameWillClose(WebKit::WebFrame* frame) {}
 
+  virtual void printPage(WebKit::WebFrame* frame) {}
+  virtual void RequestTextChecking(
+      const WebKit::WebString& text,
+      int document_tag,
+      WebKit::WebTextCheckingCompletion* completion) {}
+
   // These match the RenderView methods below.
   virtual void FrameTranslated(WebKit::WebFrame* frame) {}
   virtual void DidHandleMouseEvent(const WebKit::WebMouseEvent& event) {}
   virtual void PageCaptured(const string16& page_text) {}
 
  protected:
-  RenderViewObserver(RenderView* render_view);
+  explicit RenderViewObserver(RenderView* render_view);
   virtual ~RenderViewObserver();
 
   // IPC::Channel::Listener implementation.