Adds option to enable CSS backgrounds for printing.

chrome/renderer/print_web_view_helper.h

 // Copyright (c) 2012 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_PRINT_WEB_VIEW_HELPER_H_
 #define CHROME_RENDERER_PRINT_WEB_VIEW_HELPER_H_
 
 #include <vector>
 
 #include "base/gtest_prod_util.h"
@@ skipping 216 matching lines @@
 
   // Initialize print page settings with default settings and prepare the frame
   // for print. A new PrepareFrameAndViewForPrint is created to fulfill the
   // request and is filled into the |prepare| argument.
   // Used only for native printing workflow.
   bool InitPrintSettingsAndPrepareFrame(
       WebKit::WebFrame* frame,
       const WebKit::WebNode& node,
       scoped_ptr<PrepareFrameAndViewForPrint>* prepare);
 
-  // Update the current print settings with new |job_settings|. |job_settings|
-  // dictionary contains print job details such as printer name, number of
-  // copies, page range, etc.
+  // Update the current print settings with new |passed_job_settings|.
+  // |passed_job_settings| dictionary contains print job details such as printer
+  // name, number of copies, page range, etc.
   bool UpdatePrintSettings(WebKit::WebFrame* frame,
                            const WebKit::WebNode& node,
                            const base::DictionaryValue& passed_job_settings);
 
   // Get final print settings from the user.
   // Return false if the user cancels or on error.
   bool GetPrintSettingsFromUser(WebKit::WebFrame* frame,
                                 const WebKit::WebNode& node,
                                 int expected_pages_count,
                                 bool use_browser_overlays);
@@ skipping 248 matching lines @@
 
     State state_;
   };
 
   bool print_node_in_progress_;
   PrintPreviewContext print_preview_context_;
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 #endif  // CHROME_RENDERER_PRINT_WEB_VIEW_HELPER_H_