Implement window.print() on Android

chrome/browser/printing/print_job_worker_owner.h

 // Copyright (c) 2011 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_PRINT_JOB_WORKER_OWNER_H__
 #define CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_OWNER_H__
 
 #include "base/memory/ref_counted.h"
 #include "printing/printing_context.h"
 
@@ skipping 15 matching lines @@
     : public base::RefCountedThreadSafe<PrintJobWorkerOwner> {
  public:
   PrintJobWorkerOwner();
 
   // Finishes the initialization began by PrintJobWorker::GetSettings().
   // Creates a new PrintedDocument if necessary. Solely meant to be called by
   // PrintJobWorker.
   virtual void GetSettingsDone(const PrintSettings& new_settings,
                                PrintingContext::Result result) = 0;
 
+  virtual void ShowSystemDialogDone(PrintingContext::Result result) = 0;
+
   // Detach the PrintJobWorker associated to this object.
   virtual PrintJobWorker* DetachWorker(PrintJobWorkerOwner* new_owner) = 0;
 
   // Access the current settings.
   virtual const PrintSettings& settings() const = 0;
 
   // Cookie uniquely identifying the PrintedDocument and/or loaded settings.
   virtual int cookie() const = 0;
 
   // Returns true if the current thread is a thread on which a task
@@ skipping 11 matching lines @@
   virtual ~PrintJobWorkerOwner();
 
   // Task runner reference. Used to send notifications in the right
   // thread.
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
 };
 
 }  // namespace printing
 
 #endif  // CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_OWNER_H__