Convert device_sensors to use mojo.

content/renderer/device_sensors/device_light_event_pump.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/device_sensors/device_light_event_pump.h"
 
 #include "base/time/time.h"
-#include "content/common/device_sensors/device_light_messages.h"
 #include "content/public/renderer/render_thread.h"
 #include "third_party/WebKit/public/platform/WebDeviceLightListener.h"
 
 namespace {
 // Default rate for firing of DeviceLight events.
 const int kDefaultLightPumpFrequencyHz = 5;
 const int kDefaultLightPumpDelayMicroseconds =
     base::Time::kMicrosecondsPerSecond / kDefaultLightPumpFrequencyHz;
 }  // namespace
 
 namespace content {
 
 DeviceLightEventPump::DeviceLightEventPump(RenderThread* thread)
-    : DeviceSensorEventPump<blink::WebDeviceLightListener>(thread),
+    : DeviceMojoClientMixin<
+          DeviceSensorEventPump<blink::WebDeviceLightListener>,
+          device::mojom::LightSensor>(thread),
       last_seen_data_(-1) {
   pump_delay_microseconds_ = kDefaultLightPumpDelayMicroseconds;
 }
 
 DeviceLightEventPump::~DeviceLightEventPump() {
 }
 
-bool DeviceLightEventPump::OnControlMessageReceived(
-    const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(DeviceLightEventPump, message)
-    IPC_MESSAGE_HANDLER(DeviceLightMsg_DidStartPolling, OnDidStart)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
 void DeviceLightEventPump::FireEvent() {
   DCHECK(listener());
   DeviceLightData data;
   if (reader_->GetLatestData(&data) && ShouldFireEvent(data.value)) {
     last_seen_data_ = data.value;
     listener()->didChangeDeviceLight(data.value);
   }
 }
 
 bool DeviceLightEventPump::ShouldFireEvent(double lux) const {
   if (lux < 0)
     return false;
 
   if (lux == std::numeric_limits<double>::infinity()) {
     // no sensor data can be provided, fire an Infinity event to Blink.
     return true;
   }
 
   return lux != last_seen_data_;
 }
 
 bool DeviceLightEventPump::InitializeReader(base::SharedMemoryHandle handle) {
   if (!reader_)
     reader_.reset(new DeviceLightSharedMemoryReader());
   return reader_->Initialize(handle);
 }
 
-void DeviceLightEventPump::SendStartMessage() {
-  RenderThread::Get()->Send(new DeviceLightHostMsg_StartPolling());
-}
-
-void DeviceLightEventPump::SendStopMessage() {
-  last_seen_data_ = -1;
-  RenderThread::Get()->Send(new DeviceLightHostMsg_StopPolling());
-}
-
 void DeviceLightEventPump::SendFakeDataForTesting(void* fake_data) {
   double data = *static_cast<double*>(fake_data);
 
   listener()->didChangeDeviceLight(data);
 }
 
 }  // namespace content