Convert device_sensors to use mojo.

content/renderer/device_sensors/device_motion_event_pump.cc

Index: content/renderer/device_sensors/device_motion_event_pump.cc
diff --git a/content/renderer/device_sensors/device_motion_event_pump.cc b/content/renderer/device_sensors/device_motion_event_pump.cc
index 860cf68e2f16fb18b13f6d794e047f229991d468..d8b4f1790575ec0f35b4dad5bfcde05a31c73290 100644
--- a/content/renderer/device_sensors/device_motion_event_pump.cc
+++ b/content/renderer/device_sensors/device_motion_event_pump.cc
@@ -4,29 +4,19 @@
 
 #include "device_motion_event_pump.h"
 
-#include "content/common/device_sensors/device_motion_messages.h"
 #include "content/public/renderer/render_thread.h"
 #include "third_party/WebKit/public/platform/modules/device_orientation/WebDeviceMotionListener.h"
 
 namespace content {
 
 DeviceMotionEventPump::DeviceMotionEventPump(RenderThread* thread)
-    : DeviceSensorEventPump<blink::WebDeviceMotionListener>(thread) {
-}
+    : DeviceSensorMojoClientMixin<
+          DeviceSensorEventPump<blink::WebDeviceMotionListener>,
+          device::mojom::MotionSensor>(thread) {}
 
 DeviceMotionEventPump::~DeviceMotionEventPump() {
 }
 
-bool DeviceMotionEventPump::OnControlMessageReceived(
-    const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(DeviceMotionEventPump, message)
-    IPC_MESSAGE_HANDLER(DeviceMotionMsg_DidStartPolling, OnDidStart)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
 void DeviceMotionEventPump::FireEvent() {
   DCHECK(listener());
   blink::WebDeviceMotionData data;
@@ -40,14 +30,6 @@ bool DeviceMotionEventPump::InitializeReader(base::SharedMemoryHandle handle) {
   return reader_->Initialize(handle);
 }
 
-void DeviceMotionEventPump::SendStartMessage() {
-  RenderThread::Get()->Send(new DeviceMotionHostMsg_StartPolling());
-}
-
-void DeviceMotionEventPump::SendStopMessage() {
-  RenderThread::Get()->Send(new DeviceMotionHostMsg_StopPolling());
-}
-
 void DeviceMotionEventPump::SendFakeDataForTesting(void* fake_data) {
   blink::WebDeviceMotionData data =
       *static_cast<blink::WebDeviceMotionData*>(fake_data);