Implement window.print() on Android

chrome/browser/printing/printer_query.cc

 // 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.
 
 #include "chrome/browser/printing/printer_query.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread_restrictions.h"
@@ skipping 13 matching lines @@
 PrinterQuery::~PrinterQuery() {
   // The job should be finished (or at least canceled) when it is destroyed.
   DCHECK(!is_print_dialog_box_shown_);
   // If this fires, it is that this pending printer context has leaked.
   DCHECK(!worker_.get());
 }
 
 void PrinterQuery::GetSettingsDone(const PrintSettings& new_settings,
                                    PrintingContext::Result result) {
   is_print_dialog_box_shown_ = false;
+  is_initiated_from_android_scripted_print_ = false;
   last_status_ = result;
   if (result != PrintingContext::FAILED) {
     settings_ = new_settings;
     cookie_ = PrintSettings::NewCookie();
   } else {
     // Failure.
     cookie_ = 0;
   }
 
   if (!callback_.is_null()) {
     // This may cause reentrancy like to call StopWorker().
+    LOG(INFO) << "DGN - GetSettingsDone - Calling PrinterQuery("
+              << cookie_ <<")'s stored callback";
+
+    if (is_initiated_from_android_scripted_print_) {
+      LOG(INFO) << " DGN - THAT'S MY PQ!";

[dgn, 2014/11/20 12:26:16]

I never get there. That's the place where I expected to have my Send(reply_msg)
to be called.

+      is_initiated_from_android_scripted_print_ = false;
+    }
     callback_.Run();
     callback_.Reset();
   }
 }
 
+void PrinterQuery::SetInitiatedFromAndroidScript() {
+  is_initiated_from_android_scripted_print_ = true;
+}
+
 PrintJobWorker* PrinterQuery::DetachWorker(PrintJobWorkerOwner* new_owner) {
   DCHECK(callback_.is_null());
   DCHECK(worker_.get());
 
   worker_->SetNewOwner(new_owner);
   return worker_.release();
 }
 
 const PrintSettings& PrinterQuery::settings() const {
   return settings_;
@@ skipping 59 matching lines @@
 
 bool PrinterQuery::is_callback_pending() const {
   return !callback_.is_null();
 }
 
 bool PrinterQuery::is_valid() const {
   return worker_.get() != NULL;
 }
 
 }  // namespace printing