Remove calls to deprecated MessageLoop methods on Windows and Linux.

device/battery/battery_status_manager_linux.cc

Index: device/battery/battery_status_manager_linux.cc
diff --git a/device/battery/battery_status_manager_linux.cc b/device/battery/battery_status_manager_linux.cc
index f708b8c49f23227a474567b8ec9ad2d9d8d10581..d389afc4598c4a987382854777a4a43d34d5a7cb 100644
--- a/device/battery/battery_status_manager_linux.cc
+++ b/device/battery/battery_status_manager_linux.cc
@@ -11,6 +11,7 @@
 
 #include "base/macros.h"
 #include "base/metrics/histogram.h"
+#include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
 #include "base/values.h"
 #include "dbus/bus.h"
@@ -117,7 +118,7 @@ class BatteryStatusNotificationThread : public base::Thread {
   ~BatteryStatusNotificationThread() override {
     // Make sure to shutdown the dbus connection if it is still open in the very
     // end. It needs to happen on the BatteryStatusNotificationThread.
-    message_loop()->PostTask(
+    message_loop()->task_runner()->PostTask(
         FROM_HERE,
         base::Bind(&BatteryStatusNotificationThread::ShutdownDBusConnection,
                    base::Unretained(this)));
@@ -216,9 +217,8 @@ class BatteryStatusNotificationThread : public base::Thread {
 
     // Shutdown DBus connection later because there may be pending tasks on
     // this thread.
-    message_loop()->PostTask(FROM_HERE,
-                             base::Bind(&dbus::Bus::ShutdownAndBlock,
-                                        system_bus_));
+    message_loop()->task_runner()->PostTask(
+        FROM_HERE, base::Bind(&dbus::Bus::ShutdownAndBlock, system_bus_));
     system_bus_ = NULL;
     battery_proxy_ = NULL;
   }
@@ -281,10 +281,9 @@ class BatteryStatusManagerLinux : public BatteryStatusManager {
     if (!StartNotifierThreadIfNecessary())
       return false;
 
-    notifier_thread_->message_loop()->PostTask(
-        FROM_HERE,
-        base::Bind(&BatteryStatusNotificationThread::StartListening,
-                   base::Unretained(notifier_thread_.get())));
+    notifier_thread_->task_runner()->PostTask(
+        FROM_HERE, base::Bind(&BatteryStatusNotificationThread::StartListening,
+                              base::Unretained(notifier_thread_.get())));
     return true;
   }
 
@@ -292,10 +291,9 @@ class BatteryStatusManagerLinux : public BatteryStatusManager {
     if (!notifier_thread_)
       return;
 
-    notifier_thread_->message_loop()->PostTask(
-        FROM_HERE,
-        base::Bind(&BatteryStatusNotificationThread::StopListening,
-                   base::Unretained(notifier_thread_.get())));
+    notifier_thread_->task_runner()->PostTask(
+        FROM_HERE, base::Bind(&BatteryStatusNotificationThread::StopListening,
+                              base::Unretained(notifier_thread_.get())));
   }
 
   // Starts the notifier thread if not already started and returns true on