Implement window.print() on Android

chrome/renderer/printing/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_PRINTING_PRINT_WEB_VIEW_HELPER_H_
 #define CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 151 matching lines @@
 
   // Finalize the print ready preview document.
   bool FinalizePrintReadyDocument();
 
   // Enable/Disable window.print calls.  If |blocked| is true window.print
   // calls will silently fail.  Call with |blocked| set to false to reenable.
   void SetScriptedPrintBlocked(bool blocked);
 
   // Main printing code -------------------------------------------------------
 
-  void Print(blink::WebLocalFrame* frame, const blink::WebNode& node);
+  // |is_scripted| should be true when the call is coming from window.print()
+  void Print(blink::WebLocalFrame* frame,
+             const blink::WebNode& node,
+             bool is_scripted);
 
   // Notification when printing is done - signal tear-down/free resources.
   void DidFinishPrinting(PrintingResult result);
 
   // Print Settings -----------------------------------------------------------
 
   // Initialize print page settings with default settings.
   // Used only for native printing workflow.
   bool InitPrintSettings(bool fit_to_paper_size);
 
@@ skipping 10 matching lines @@
   // |passed_job_settings| dictionary contains print job details such as printer
   // name, number of copies, page range, etc.
   bool UpdatePrintSettings(blink::WebLocalFrame* frame,
                            const blink::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(blink::WebFrame* frame,
                                 const blink::WebNode& node,
-                                int expected_pages_count);
+                                int expected_pages_count,
+                                bool is_scripted);
 
   // Page Printing / Rendering ------------------------------------------------
 
   void OnFramePreparedForPrintPages();
   void PrintPages();
   bool PrintPagesNative(blink::WebFrame* frame, int page_count);
   void FinishFramePrinting();
 
   // Prints the page listed in |params|.
 #if defined(OS_LINUX) || defined(OS_ANDROID)
@@ skipping 248 matching lines @@
   base::Closure on_stop_loading_closure_;
 
   base::WeakPtrFactory<PrintWebViewHelper> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_