chrome/browser: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

chrome/browser/printing/print_preview_pdf_generated_browsertest.cc

 // Copyright 2014 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 <algorithm>
 #include <fstream>
 #include <iostream>
 #include <iterator>
 #include <limits>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
+#include "base/location.h"
 #include "base/logging.h"
 #include "base/md5.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/string_split.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/thread_task_runner_handle.h"
 #include "chrome/browser/printing/print_preview_dialog_controller.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/webui/print_preview/print_preview_ui.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "components/printing/common/print_messages.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 83 matching lines @@
 
   ~PrintPreviewObserver() override {}
 
   // Sets closure for the observer so that it can end the loop.
   void set_quit_closure(const base::Closure &closure) {
     quit_closure_ = closure;
   }
 
   // Actually stops the message loop so that the test can proceed.
   void EndLoop() {
-    base::MessageLoop::current()->PostTask(FROM_HERE, quit_closure_);
+    base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE, quit_closure_);
   }
 
   bool OnMessageReceived(const IPC::Message& message) override {
     IPC_BEGIN_MESSAGE_MAP(PrintPreviewObserver, message)
       IPC_MESSAGE_HANDLER(PrintHostMsg_DidGetPreviewPageCount,
                           OnDidGetPreviewPageCount)
     IPC_END_MESSAGE_MAP();
     return false;
   }
 
@@ skipping 489 matching lines @@
     // waiting for this message and start waiting for the image data.
     std::cout << "#EOF\n";
     std::cout.flush();
 
     SendPng();
     Reset();
   }
 }
 
 }  // namespace printing