Implement window.print() on Android

chrome/browser/printing/printer_query.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_BROWSER_PRINTING_PRINTER_QUERY_H_
 #define CHROME_BROWSER_PRINTING_PRINTER_QUERY_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 46 matching lines @@
   void StopWorker();
 
   // Returns true if a GetSettings() call is pending completion.
   bool is_callback_pending() const;
 
   PrintingContext::Result last_status() const { return last_status_; }
 
   // Returns if a worker thread is still associated to this instance.
   bool is_valid() const;
 
+  void SetInitiatedFromAndroidScript();
+
  private:
   ~PrinterQuery() override;
 
   // Lazy create the worker thread. There is one worker thread per print job.
   void StartWorker(const base::Closure& callback);
 
   // All the UI is done in a worker thread because many Win32 print functions
   // are blocking and enters a message loop without your consent. There is one
   // worker thread per print job.
   scoped_ptr<PrintJobWorker> worker_;
 
   // Cache of the print context settings for access in the UI thread.
   PrintSettings settings_;
 
   // Is the Print... dialog box currently shown.
   bool is_print_dialog_box_shown_;
 
+  bool is_initiated_from_android_scripted_print_;
+
   // Cookie that make this instance unique.
   int cookie_;
 
   // Results from the last GetSettingsDone() callback.
   PrintingContext::Result last_status_;
 
   // Callback waiting to be run.
   base::Closure callback_;
 
   DISALLOW_COPY_AND_ASSIGN(PrinterQuery);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_BROWSER_PRINTING_PRINTER_QUERY_H_