Implement WebBluetooth getDescriptor[s]

third_party/WebKit/Source/modules/bluetooth/BluetoothAttributeInstanceMap.h

Index: third_party/WebKit/Source/modules/bluetooth/BluetoothAttributeInstanceMap.h
diff --git a/third_party/WebKit/Source/modules/bluetooth/BluetoothAttributeInstanceMap.h b/third_party/WebKit/Source/modules/bluetooth/BluetoothAttributeInstanceMap.h
index 17177a84555178f54514bfa6707e62c7538f6060..fc7e15ba6934cb4a2dbadefa630bfa5fc5aab9e1 100644
--- a/third_party/WebKit/Source/modules/bluetooth/BluetoothAttributeInstanceMap.h
+++ b/third_party/WebKit/Source/modules/bluetooth/BluetoothAttributeInstanceMap.h
@@ -6,6 +6,7 @@
 #define BluetoothAttributeInstanceMap_h
 
 #include "modules/bluetooth/BluetoothRemoteGATTCharacteristic.h"
+#include "modules/bluetooth/BluetoothRemoteGATTDescriptor.h"
 #include "modules/bluetooth/BluetoothRemoteGATTService.h"
 #include "platform/heap/Handle.h"
 #include "platform/heap/Heap.h"
@@ -53,6 +54,18 @@ class BluetoothAttributeInstanceMap final
   // |characteristicInstanceId| is in the map.
   bool containsCharacteristic(const String& characteristicInstanceId);
 
+  // Constructs a new BluetoothRemoteGATTDescriptor object if there was no
+  // descriptor with the same instance id and adds it to the map.
+  // Otherwise returns the BluetoothRemoteGATTDescriptor object already in
+  // the map.
+  BluetoothRemoteGATTDescriptor* getOrCreateBluetoothRemoteGATTDescriptor(
+      std::unique_ptr<WebBluetoothRemoteGATTDescriptorInit>,
+      BluetoothRemoteGATTCharacteristic*);
+
+  // Returns true if a BluetoothRemoteGATTDescriptor with
+  // |descriptorInstanceId| is in the map.
+  bool containsDescriptor(const String& descriptorInstanceId);
+
   // Removes all Attributes from the map.
   // TODO(crbug.com/654950): Remove descriptors when implemented.
   void Clear();
@@ -67,6 +80,9 @@ class BluetoothAttributeInstanceMap final
   // Map of characteristic instance ids to objects.
   HeapHashMap<String, Member<BluetoothRemoteGATTCharacteristic>>
       m_characteristicIdToObject;
+  // Map of descriptor instance ids to objects.
+  HeapHashMap<String, Member<BluetoothRemoteGATTDescriptor>>
+      m_descriptorIdToObject;
 };
 
 }  // namespace blink