Convert device_sensors to use mojo.

content/renderer/device_sensors/device_motion_event_pump.h

Index: content/renderer/device_sensors/device_motion_event_pump.h
diff --git a/content/renderer/device_sensors/device_motion_event_pump.h b/content/renderer/device_sensors/device_motion_event_pump.h
index 1fb222920e835488c8a3273fd5b1c5dae40272f3..81968f74b1ae496c8e177d241bc94e2a7219c49c 100644
--- a/content/renderer/device_sensors/device_motion_event_pump.h
+++ b/content/renderer/device_sensors/device_motion_event_pump.h
@@ -10,6 +10,7 @@
 #include "base/macros.h"
 #include "content/renderer/device_sensors/device_sensor_event_pump.h"
 #include "content/renderer/shared_memory_seqlock_reader.h"
+#include "device/sensors/public/interfaces/motion.mojom.h"
 #include "third_party/WebKit/public/platform/modules/device_orientation/WebDeviceMotionData.h"
 
 namespace blink {
@@ -22,23 +23,20 @@ typedef SharedMemorySeqLockReader<blink::WebDeviceMotionData>
     DeviceMotionSharedMemoryReader;
 
 class CONTENT_EXPORT DeviceMotionEventPump
-    : public DeviceSensorEventPump<blink::WebDeviceMotionListener> {
+    : public DeviceSensorMojoClientMixin<
+          DeviceSensorEventPump<blink::WebDeviceMotionListener>,
+          device::mojom::MotionSensor> {
  public:
   explicit DeviceMotionEventPump(RenderThread* thread);
   ~DeviceMotionEventPump() override;
 
-  // // PlatformEventObserver.
-  bool OnControlMessageReceived(const IPC::Message& message) override;
+  // PlatformEventObserver.
   void SendFakeDataForTesting(void* fake_data) override;
 
  protected:
   void FireEvent() override;
   bool InitializeReader(base::SharedMemoryHandle handle) override;
 
-  // PlatformEventObserver.
-  void SendStartMessage() override;
-  void SendStopMessage() override;
-
   std::unique_ptr<DeviceMotionSharedMemoryReader> reader_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceMotionEventPump);