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

chrome/browser/printing/print_dialog_cloud.cc

Index: chrome/browser/printing/print_dialog_cloud.cc
diff --git a/chrome/browser/printing/print_dialog_cloud.cc b/chrome/browser/printing/print_dialog_cloud.cc
index d2118fcb61f941906c737d5d05e35c00b79fbbc7..39bec55d25d26e1bc345af375764c51fb9af1b9d 100644
--- a/chrome/browser/printing/print_dialog_cloud.cc
+++ b/chrome/browser/printing/print_dialog_cloud.cc
@@ -11,8 +11,11 @@
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/json/json_reader.h"
+#include "base/location.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 "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/devtools/devtools_window.h"
@@ -147,10 +150,9 @@ class SignInObserver : public content::WebContentsObserver {
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) override {
     if (IsSimilarUrl(params.url, cloud_print_url_)) {
-      base::MessageLoop::current()->PostTask(
-          FROM_HERE,
-          base::Bind(&SignInObserver::OnSignIn,
-                     weak_ptr_factory_.GetWeakPtr()));
+      base::ThreadTaskRunnerHandle::Get()->PostTask(
+          FROM_HERE, base::Bind(&SignInObserver::OnSignIn,
+                                weak_ptr_factory_.GetWeakPtr()));
     }
   }
 
@@ -594,7 +596,7 @@ void CloudPrintWebDialogDelegate::OnDialogClosed(
   // End the keep-alive so that Chrome can exit.
   if (!modal_parent_ && keep_alive_when_non_modal_) {
     // Post to prevent recursive call tho this function.
-    base::MessageLoop::current()->PostTask(
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE, base::Bind(&chrome::DecrementKeepAliveCount));
   }
   delete this;