bluetooth: macOS: Adding histograms for NSError values

device/bluetooth/bluetooth_low_energy_device_mac.mm

Index: device/bluetooth/bluetooth_low_energy_device_mac.mm
diff --git a/device/bluetooth/bluetooth_low_energy_device_mac.mm b/device/bluetooth/bluetooth_low_energy_device_mac.mm
index 1e25ff41326e93ba4a4cd90c7abf1a91906eeaab..908dbf777171cb70d1101fdcb9767ac03b61d2f8 100644
--- a/device/bluetooth/bluetooth_low_energy_device_mac.mm
+++ b/device/bluetooth/bluetooth_low_energy_device_mac.mm
@@ -14,6 +14,7 @@
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/sys_string_conversions.h"
 #include "device/bluetooth/bluetooth_adapter_mac.h"
+#include "device/bluetooth/bluetooth_adapter_mac_metrics.h"
 #include "device/bluetooth/bluetooth_device.h"
 #include "device/bluetooth/bluetooth_low_energy_peripheral_delegate.h"
 #include "device/bluetooth/bluetooth_remote_gatt_characteristic_mac.h"
@@ -222,6 +223,7 @@ void BluetoothLowEnergyDeviceMac::DidDiscoverPrimaryServices(NSError* error) {
     discovery_pending_count_ = 0;
     return;
   }
+  LogDidDiscoverPrimaryServicesErrorToHistogram(error);
   if (error) {
     // TODO(http://crbug.com/609320): Need to pass the error.
     // TODO(http://crbug.com/609844): Decide what to do if discover failed
@@ -268,6 +270,7 @@ void BluetoothLowEnergyDeviceMac::DidDiscoverPrimaryServices(NSError* error) {
 void BluetoothLowEnergyDeviceMac::DidDiscoverCharacteristics(
     CBService* cb_service,
     NSError* error) {
+  LogDidDiscoverCharacteristicsErrorToHistogram(error);
   if (error) {
     // TODO(http://crbug.com/609320): Need to pass the error.
     // TODO(http://crbug.com/609844): Decide what to do if discover failed
@@ -347,6 +350,7 @@ void BluetoothLowEnergyDeviceMac::DidUpdateNotificationState(
 void BluetoothLowEnergyDeviceMac::DidDiscoverDescriptors(
     CBCharacteristic* cb_characteristic,
     NSError* error) {
+  LogDidDiscoverDescriptorsErrorToHistogram(error);
   if (error) {
     // TODO(http://crbug.com/609320): Need to pass the error.
     // TODO(http://crbug.com/609844): Decide what to do if discover failed
@@ -491,6 +495,7 @@ BluetoothLowEnergyDeviceMac::GetBluetoothRemoteGattDescriptorMac(
 void BluetoothLowEnergyDeviceMac::DidDisconnectPeripheral(NSError* error) {
   connected_ = false;
   VLOG(1) << *this << ": Disconnected from peripheral.";
+  LogDidDisconnectPeripheralErrorToHistogram(error);
   if (error) {
     VLOG(1) << *this
             << ": Bluetooth error: " << BluetoothAdapterMac::String(error);