PrintPreview: While printing the preview data, set the initiator tab title as print job name.

chrome/browser/printing/print_view_manager.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_VIEW_MANAGER_H_
 #define CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
 #include "base/string16.h"
@@ skipping 33 matching lines @@
   // TabContentsObserver implementation.
   virtual bool OnMessageReceived(const IPC::Message& message);
 
   // Terminates or cancels the print job if one was pending.
   virtual void RenderViewGone();
 
   // Cancels the print job.
   virtual void StopNavigation();
 
  private:
-  void OnDidGetPrintedPagesCount(int cookie, int number_pages);
+  void OnDidGetBasicPrintJobInfo(int cookie,
+                                 int number_pages,
+                                 const string16& job_title);
   void OnDidPrintPage(const PrintHostMsg_DidPrintPage_Params& params);
 
   // Processes a NOTIFY_PRINT_JOB_EVENT notification.
   void OnNotifyPrintJobEvent(const JobEventDetails& event_details);
 
   // Requests the RenderView to render all the missing pages for the print job.
   // Noop if no print job is pending. Returns true if at least one page has been
   // requested to the renderer.
   bool RenderAllMissingPagesNow();
 
@@ skipping 56 matching lines @@
   // Running an inner message loop inside RenderAllMissingPagesNow(). This means
   // we are _blocking_ until all the necessary pages have been rendered or the
   // print settings are being loaded.
   bool inside_inner_message_loop_;
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   // Set to true when OnDidPrintPage() should be expecting the first page.
   bool expecting_first_page_;
 #endif
 
+  // Current print job title.
+  // For preview printing, |job_title_| is set to initiator tab title in
+  // PrintHostMsg_DidGetBasicPrintJobInfo message handler.
+  // For normal printing, |job_title_| is empty. Print view manager will use
+  // the current tab title as print job title. If the current tab title is
+  // empty, use the default job title.
+  string16 job_title_;
+
   DISALLOW_COPY_AND_ASSIGN(PrintViewManager);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_H_