Add Print Selection support to Chrome. This change is fairly involved since ...

chrome/renderer/render_view.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 CHROME_RENDERER_RENDER_VIEW_H_
 #define CHROME_RENDERER_RENDER_VIEW_H_
 
 #include <string>
 #include <queue>
 #include <vector>
@@ skipping 443 matching lines @@
                             const GURL& frame_url,
                             std::wstring* result);
 
   // Adds search provider from the given OpenSearch description URL as a
   // keyword search.
   void AddGURLSearchProvider(const GURL& osd_url, bool autodetected);
 
   // RenderView IPC message handlers
   void SendThumbnail();
   void OnPrintPages();
+  void OnPrintingDone(int document_cookie, bool success);
   void OnNavigate(const ViewMsg_Navigate_Params& params);
   void OnStop();
   void OnLoadAlternateHTMLText(const std::string& html_contents,
                                bool new_navigation,
                                const GURL& display_url,
                                const std::string& security_info);
   void OnStopFinding(bool clear_selection);
   void OnFindReplyAck();
   void OnUpdateTargetURLAck();
   void OnUndo();
@@ skipping 312 matching lines @@
 
   // The text selection the last time DidChangeSelection got called.
   std::string last_selection_;
 
   // Holds state pertaining to a navigation that we initiated.  This is held by
   // the WebDataSource::ExtraData attribute.  We use pending_navigation_state_
   // as a temporary holder for the state until the WebDataSource corresponding
   // to the new navigation is created.  See DidCreateDataSource.
   scoped_ptr<NavigationState> pending_navigation_state_;
 
-  // Need for printing
-  scoped_ptr<PrintWebViewHelper> print_render_view_;
+  // PrintWebViewHelper handles printing.  Note that this object is constructed
+  // when printing for the first time but only destroyed with the RenderView.
+  scoped_ptr<PrintWebViewHelper> print_helper_;
 
   RendererPreferences renderer_preferences_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderView);
 };
 
 #endif  // CHROME_RENDERER_RENDER_VIEW_H_