Remove DeviceLightEvent implementation

device/sensors/device_sensor_service.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 "device/sensors/device_sensor_service.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "base/trace_event/trace_event.h"
 #include "device/sensors/data_fetcher_shared_memory.h"
 
 namespace device {
 
 DeviceSensorService::DeviceSensorService()
-    : num_light_readers_(0),
-      num_motion_readers_(0),
+    : num_motion_readers_(0),
       num_orientation_readers_(0),
       num_orientation_absolute_readers_(0),
       is_shutdown_(false) {
   base::MessageLoop::current()->AddDestructionObserver(this);
 }
 
 DeviceSensorService::~DeviceSensorService() {}
 
 DeviceSensorService* DeviceSensorService::GetInstance() {
   return base::Singleton<DeviceSensorService, base::LeakySingletonTraits<
@@ skipping 31 matching lines @@
       DCHECK_GE(num_motion_readers_, 0);
       return true;
     case CONSUMER_TYPE_ORIENTATION:
       num_orientation_readers_ += delta;
       DCHECK_GE(num_orientation_readers_, 0);
       return true;
     case CONSUMER_TYPE_ORIENTATION_ABSOLUTE:
       num_orientation_absolute_readers_ += delta;
       DCHECK_GE(num_orientation_absolute_readers_, 0);
       return true;
-    case CONSUMER_TYPE_LIGHT:
-      num_light_readers_ += delta;
-      DCHECK_GE(num_light_readers_, 0);
-      return true;
     default:
       NOTREACHED();
   }
   return false;
 }
 
 int DeviceSensorService::GetNumberConsumers(ConsumerType consumer_type) const {
   switch (consumer_type) {
     case CONSUMER_TYPE_MOTION:
       return num_motion_readers_;
     case CONSUMER_TYPE_ORIENTATION:
       return num_orientation_readers_;
     case CONSUMER_TYPE_ORIENTATION_ABSOLUTE:
       return num_orientation_absolute_readers_;
-    case CONSUMER_TYPE_LIGHT:
-      return num_light_readers_;
     default:
       NOTREACHED();
   }
   return 0;
 }
 
 mojo::ScopedSharedBufferHandle DeviceSensorService::GetSharedMemoryHandle(
     ConsumerType consumer_type) {
   DCHECK(thread_checker_.CalledOnValidThread());
   return data_fetcher_->GetSharedMemoryHandle(consumer_type);
@@ skipping 14 matching lines @@
 }
 
 void DeviceSensorService::SetDataFetcherForTesting(
     DataFetcherSharedMemory* test_data_fetcher) {
   if (data_fetcher_)
     data_fetcher_->Shutdown();
   data_fetcher_.reset(test_data_fetcher);
 }
 
 }  // namespace device