bluetooth: Add histograms and logging for getCharacteristic

content/browser/bluetooth/bluetooth_metrics.cc

 // Copyright 2015 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/browser/bluetooth/bluetooth_metrics.h"
 
 #include "base/hash.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/sparse_histogram.h"
 #include "content/common/bluetooth/bluetooth_scan_filter.h"
@@ skipping 122 matching lines @@
 }
 
 // static
 void BluetoothMetrics::RecordGetPrimaryServiceOutcome(
     UMAGetPrimaryServiceOutcome outcome) {
   UMA_HISTOGRAM_ENUMERATION(
       "Bluetooth.Web.GetPrimaryService.Outcome", static_cast<int>(outcome),
       static_cast<int>(UMAGetPrimaryServiceOutcome::COUNT));
 }
 
+// getCharacteristic
+
+// static
+void BluetoothMetrics::RecordGetCharacteristicOutcome(
+    UMAGetCharacteristicOutcome outcome) {
+  UMA_HISTOGRAM_ENUMERATION(
+      "Bluetooth.Web.GetCharacteristic.Outcome", static_cast<int>(outcome),
+      static_cast<int>(UMAGetCharacteristicOutcome::COUNT));
+}
+
+// static
+void BluetoothMetrics::RecordGetCharacteristicCharacteristic(
+    const std::string& characteristic) {
+  UMA_HISTOGRAM_SPARSE_SLOWLY("Bluetooth.Web.GetCharacteristic.Characteristic",
+                              HashUUID(characteristic));
+}
+
 // read/write characteristic
 
 // static
 void BluetoothMetrics::RecordGATTError(UMAGATTError error) {
   UMA_HISTOGRAM_ENUMERATION("Bluetooth.GATTErrors", static_cast<int>(error),
                             static_cast<int>(UMAGATTError::MAX_ERROR));
 }
 
 }  // namespace content