bluetooth: Add histograms and logging for getCharacteristic

content/browser/bluetooth/bluetooth_metrics.h

Index: content/browser/bluetooth/bluetooth_metrics.h
diff --git a/content/browser/bluetooth/bluetooth_metrics.h b/content/browser/bluetooth/bluetooth_metrics.h
index 88f0feaa1ae377a0321bb8d3a0323bc44dfce654..581cea4aa1df06b8f08f806893a83539d3f8543d 100644
--- a/content/browser/bluetooth/bluetooth_metrics.h
+++ b/content/browser/bluetooth/bluetooth_metrics.h
@@ -97,6 +97,22 @@ class BluetoothMetrics {
   static void RecordGetPrimaryServiceOutcome(
       UMAGetPrimaryServiceOutcome outcome);
 
+  // getCharacteristic()
+  enum class UMAGetCharacteristicOutcome {
+    SUCCESS = 0,
+    NO_DEVICE = 1,
+    NO_SERVICE = 2,
+    NOT_FOUND = 3,
+    // Note: Add new outcomes immediately above this line.
+    // Make sure to update the enum list in
+    // tools/metrisc/histogram/histograms.xml accordingly.
+    COUNT
+  };
+  static void RecordGetCharacteristicOutcome(
+      UMAGetCharacteristicOutcome outcome);
+  static void RecordGetCharacteristicCharacteristic(
+      const std::string& characteristic);
+
   // read/write characteristics
   // TODO(ortuno): For now we are just copying over the code to record these
   // errors but a follow up CL will add a function for each operation.