Implement PrintPageAsJPEG feature for Print Preview

src/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 131 matching lines @@
   }
 
   int browser_window_id() {
     return browser_window_id_;
   }
 
   ViewType::Type view_type() {
     return view_type_;
   }
 
+  PrintWebViewHelper* print_helper() {
+    return print_helper_.get();
+  }
+
   // IPC::Channel::Listener
   virtual void OnMessageReceived(const IPC::Message& msg);
 
   // WebViewDelegate
   virtual bool CanAcceptLoadDrops() const;
   virtual void RunJavaScriptAlert(WebKit::WebFrame* webframe,
                                   const std::wstring& message);
   virtual bool RunJavaScriptConfirm(WebKit::WebFrame* webframe,
                                     const std::wstring& message);
   virtual bool RunJavaScriptPrompt(WebKit::WebFrame* webframe,
@@ skipping 713 matching lines @@
   // page id for the last navigation sent to the browser.
   int32 last_top_level_navigation_page_id_;
 
   // The settings this render view initialized WebKit with.
   WebPreferences webkit_preferences_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderView);
 };
 
 #endif  // CHROME_RENDERER_RENDER_VIEW_H_