Remove calls to deprecated MessageLoop methods in content.

content/renderer/device_sensors/device_motion_event_pump_unittest.cc

Index: content/renderer/device_sensors/device_motion_event_pump_unittest.cc
diff --git a/content/renderer/device_sensors/device_motion_event_pump_unittest.cc b/content/renderer/device_sensors/device_motion_event_pump_unittest.cc
index bdba6c1688af91306375e5f4e0163d41d8c3985d..d1b8be01458126cf1793558366c11edf8e859560 100644
--- a/content/renderer/device_sensors/device_motion_event_pump_unittest.cc
+++ b/content/renderer/device_sensors/device_motion_event_pump_unittest.cc
@@ -11,6 +11,7 @@
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/macros.h"
+#include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/common/device_sensors/device_motion_hardware_buffer.h"
@@ -137,7 +138,7 @@ TEST_F(DeviceMotionEventPumpTest, DidStartPolling) {
   motion_pump()->Start(listener());
   motion_pump()->OnDidStart(handle());
 
-  base::MessageLoop::current()->Run();
+  base::RunLoop().Run();
 
   const blink::WebDeviceMotionData& received_data = listener()->data();
   EXPECT_TRUE(listener()->did_change_device_motion());
@@ -164,7 +165,7 @@ TEST_F(DeviceMotionEventPumpTest, DidStartPollingNotAllSensorsActive) {
   motion_pump()->Start(listener());
   motion_pump()->OnDidStart(handle());
 
-  base::MessageLoop::current()->Run();
+  base::RunLoop().Run();
 
   const blink::WebDeviceMotionData& received_data = listener()->data();
   // No change in device motion because allAvailableSensorsAreActive is false.
@@ -199,7 +200,7 @@ TEST_F(DeviceMotionEventPumpTest, PumpThrottlesEventRate) {
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, base::MessageLoop::QuitWhenIdleClosure(),
       base::TimeDelta::FromMilliseconds(100));
-  base::MessageLoop::current()->Run();
+  base::RunLoop().Run();
   motion_pump()->Stop();
 
   // Check that the blink::WebDeviceMotionListener does not receive excess