Simplify threading in browser thread by making only ChromeThread deal with di...

chrome/browser/printing/print_job_worker.cc

 // Copyright (c) 2006-2008 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/print_job_worker.h"
 
 #include "base/message_loop.h"
 #include "chrome/browser/chrome_thread.h"
 #include "chrome/browser/printing/print_job.h"
 #include "chrome/common/notification_service.h"
@@ skipping 59 matching lines @@
                                  bool has_selection) {
   DCHECK_EQ(message_loop(), MessageLoop::current());
   DCHECK_EQ(page_number_, PageNumber::npos());
 
   // Recursive task processing is needed for the dialog in case it needs to be
   // destroyed by a task.
   MessageLoop::current()->SetNestableTasksAllowed(true);
 
   if (ask_user_for_settings) {
 #if defined(OS_MACOSX)
-    ChromeThread::GetMessageLoop(ChromeThread::UI)->PostTask(
-        FROM_HERE, NewRunnableMethod(this, &PrintJobWorker::GetSettingsWithUI,
-                                     parent_window, document_page_count,
-                                     has_selection));
+    ChromeThread::PostTask(
+        ChromeThread::UI, FROM_HERE,
+        NewRunnableMethod(this, &PrintJobWorker::GetSettingsWithUI,
+                          parent_window, document_page_count,
+                          has_selection));
 #else
     PrintingContext::Result result = printing_context_.AskUserForSettings(
         parent_window, document_page_count, has_selection);
     GetSettingsDone(result);
 #endif
   } else {
     PrintingContext::Result result = printing_context_.UseDefaultSettings();
     GetSettingsDone(result);
   }
 }
@@ skipping 10 matching lines @@
       owner_,
       &PrintJobWorkerOwner::GetSettingsDone,
       printing_context_.settings(),
       result));
 }
 
 #if defined(OS_MACOSX)
 void PrintJobWorker::GetSettingsWithUI(gfx::NativeWindow parent_window,
                                        int document_page_count,
                                        bool has_selection) {
-  DCHECK_EQ(ChromeThread::GetMessageLoop(ChromeThread::UI),
-            MessageLoop::current());
+  DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
 
   PrintingContext::Result result = printing_context_.AskUserForSettings(
       parent_window, document_page_count, has_selection);
   message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
       this, &PrintJobWorker::GetSettingsDone, result));
 }
 #endif
 
 void PrintJobWorker::StartPrinting(PrintedDocument* new_document) {
   DCHECK_EQ(message_loop(), MessageLoop::current());
@@ skipping 191 matching lines @@
     printing::PrintJobWorker* obj) {
   DCHECK(!owner_.get());
   owner_ = obj->owner_;
 }
 
 void RunnableMethodTraits<printing::PrintJobWorker>::ReleaseCallee(
     printing::PrintJobWorker* obj) {
   DCHECK_EQ(owner_, obj->owner_);
   owner_ = NULL;
 }