Generic sensor code clean up (add necessary and remove unnecessary {})

This CL adds necessary {} and removes unnecessary {} for generic_sensor
code.

Bug: None
Change-Id: I1a752303d39ddb2d215a018ee6adeacd7f8d1b58
Reviewed-on: https://chromium-review.googlesource.com/687556Reviewed-by: Mikhail Pozdnyakov <mikhail.pozdnyakov@intel.com>
Commit-Queue: Jun Cai <juncai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#504757}

services/device/generic_sensor/linux/sensor_device_manager.cc

@@ -103,8 +103,9 @@ void SensorDeviceManager::OnDeviceAdded(udev_device* dev) {
     }
 
     if (sensor_file_names.empty() ||
-        sensor_file_names.size() > SensorReadingRaw::kValuesCount)
+        sensor_file_names.size() > SensorReadingRaw::kValuesCount) {
       continue;
+    }
 
     const std::string scaling_value =
         GetUdevDeviceGetSysattrValue(dev, data.sensor_scale_name.c_str());

services/device/generic_sensor/platform_sensor.cc

@@ -138,9 +138,8 @@ bool PlatformSensor::UpdateSensorInternal(const ConfigMap& configurations) {
 
     const auto& conf_list = pair.second;
     for (const auto& configuration : conf_list) {
-      if (!optimal_configuration || configuration > *optimal_configuration) {
+      if (!optimal_configuration || configuration > *optimal_configuration)
         optimal_configuration = &configuration;
-      }
     }
   }
 

services/device/generic_sensor/platform_sensor_fusion_algorithm.cc

@@ -23,8 +23,9 @@ bool PlatformSensorFusionAlgorithm::IsReadingSignificantlyDifferent(
     const SensorReading& reading2) {
   for (size_t i = 0; i < SensorReadingRaw::kValuesCount; ++i) {
     if (std::fabs(reading1.raw.values[i] - reading2.raw.values[i]) >=
-        threshold_)
+        threshold_) {
       return true;
+    }
   }
   return false;
 }

services/device/generic_sensor/platform_sensor_provider_linux.cc

@@ -238,8 +238,9 @@ void PlatformSensorProviderLinux::OnDeviceRemoved(
   DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
   auto it = sensor_devices_by_type_.find(type);
   if (it != sensor_devices_by_type_.end() &&
-      it->second->device_node == device_node)
+      it->second->device_node == device_node) {
     sensor_devices_by_type_.erase(it);
+  }
 }
 
 void PlatformSensorProviderLinux::CreateFusionSensor(