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

chrome/browser/printing/cloud_print/cloud_print_proxy_service.cc

Index: chrome/browser/printing/cloud_print/cloud_print_proxy_service.cc
diff --git a/chrome/browser/printing/cloud_print/cloud_print_proxy_service.cc b/chrome/browser/printing/cloud_print/cloud_print_proxy_service.cc
index f859b1fca42aa27a89a3e90ef67b4593d0d532b7..323a4439112453e7c3e717c7a67d363ac4c69b54 100644
--- a/chrome/browser/printing/cloud_print/cloud_print_proxy_service.cc
+++ b/chrome/browser/printing/cloud_print/cloud_print_proxy_service.cc
@@ -12,10 +12,12 @@
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/json/json_reader.h"
-#include "base/message_loop/message_loop.h"
+#include "base/location.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/thread_task_runner_handle.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
@@ -144,8 +146,8 @@ void CloudPrintProxyService::GetPrinters(const PrintersCallback& callback) {
     }
     UMA_HISTOGRAM_COUNTS_10000("CloudPrint.AvailablePrintersList",
                                printers.size());
-    base::MessageLoop::current()->PostTask(FROM_HERE,
-                                           base::Bind(callback, printers));
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
+        FROM_HERE, base::Bind(callback, printers));
   } else {
     InvokeServiceTask(
         base::Bind(&CloudPrintProxyService::GetCloudPrintProxyPrinters,