Move RenderProcessObserver and RenderViewVisitor to content\public\renderer and put them in the c...

content/public/renderer/render_view_visitor.h

 // Copyright (c) 2009 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.
 
-#ifndef CONTENT_RENDERER_RENDER_VIEW_VISITOR_H_
-#define CONTENT_RENDERER_RENDER_VIEW_VISITOR_H_
+#ifndef CONTENT_PUBLIC_RENDERER_RENDER_VIEW_VISITOR_H_
+#define CONTENT_PUBLIC_RENDERER_RENDER_VIEW_VISITOR_H_
 #pragma once
 
 class RenderView;
 
+namespace content {
+
 class RenderViewVisitor {
  public:
   // Return true to continue visiting RenderViews or false to stop.
   virtual bool Visit(RenderView* render_view) = 0;
 
  protected:
   virtual ~RenderViewVisitor() {}
 };
 
-#endif  // CONTENT_RENDERER_RENDER_VIEW_VISITOR_H_
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_RENDERER_RENDER_VIEW_VISITOR_H_