Implement WebBluetooth getDescriptor[s]

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

Index: third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.h
diff --git a/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.h b/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.h
new file mode 100644
index 0000000000000000000000000000000000000000..e1b71d9d09ae0fb2ac56df0a1fb29c4c7eef2ed0
--- /dev/null
+++ b/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.h
@@ -0,0 +1,72 @@
+// Copyright 2016 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.
+
+#ifndef BluetoothRemoteGATTDescriptor_h
+#define BluetoothRemoteGATTDescriptor_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "core/dom/ActiveDOMObject.h"
+#include "core/dom/DOMArrayPiece.h"
+#include "core/dom/DOMDataView.h"
+#include "modules/EventTargetModules.h"
+#include "modules/bluetooth/BluetoothRemoteGATTCharacteristic.h"
+#include "modules/bluetooth/BluetoothRemoteGATTService.h"
+#include "platform/heap/Handle.h"
+#include "public/platform/modules/bluetooth/WebBluetoothRemoteGATTCharacteristic.h"
+#include "public/platform/modules/bluetooth/WebBluetoothRemoteGATTDescriptorInit.h"
+#include "wtf/text/WTFString.h"
+#include <memory>
+
+namespace blink {
+
+class BluetoothRemoteGATTCharacteristic;
+class ScriptPromise;
+class ScriptState;
+
+// BluetoothRemoteGATTDescriptor represents a GATT Descriptor, which is
+// a basic data element that provides further information about a peripheral's
+// characteristic.
+

[ortuno, 2016/12/02 06:14:51]

nit: Remove blank line.

[dougt, 2016/12/02 18:31:29]

Done.

+class BluetoothRemoteGATTDescriptor final
+    : public GarbageCollectedFinalized<BluetoothRemoteGATTDescriptor>,
+      public ScriptWrappable {
+  DEFINE_WRAPPERTYPEINFO();
+
+ public:
+  explicit BluetoothRemoteGATTDescriptor(

[ortuno, 2016/12/02 06:14:51]

No need for explicit since the function doesn't take a single parameter.

[dougt, 2016/12/02 18:31:29]

Done.

+      std::unique_ptr<WebBluetoothRemoteGATTDescriptorInit>,
+      BluetoothRemoteGATTCharacteristic*);
+
+  static BluetoothRemoteGATTDescriptor* create(

[ortuno, 2016/12/02 06:14:51]

We don't do anything special in create so just use new I think.

[dougt, 2016/12/02 18:31:29]

Acknowledged.

We test for a null input and this sort of factory static pattern is used by the
characteristic.  Keep it for symmetry.?

[ortuno, 2016/12/07 08:05:12]

Characteristic needs it because it's an ActiveDOMObject that needs to some stuff
after it's constructed. Service does not have a create method.

+      std::unique_ptr<WebBluetoothRemoteGATTDescriptorInit>,
+      BluetoothRemoteGATTCharacteristic*);
+
+  // Save value.

[ortuno, 2016/12/02 06:14:51]

No need for this yet.

[dougt, 2016/12/02 18:31:29]

Done.

+  void setValue(DOMDataView*);
+
+  // IDL exposed interface:
+  BluetoothRemoteGATTCharacteristic* characteristic() {
+    return m_characteristic;
+  }
+  String uuid() { return m_webDescriptor->uuid; }
+  DOMDataView* value() const { return m_value; }
+  ScriptPromise readValue(ScriptState*);
+  ScriptPromise writeValue(ScriptState*, const DOMArrayPiece&);
+
+  // Interface required by garbage collection.
+  DECLARE_VIRTUAL_TRACE();
+
+ private:
+  friend class DescriptorReadValueCallback;
+
+  BluetoothRemoteGATTServer* getGatt() { return m_characteristic->gatt(); }
+
+  std::unique_ptr<WebBluetoothRemoteGATTDescriptorInit> m_webDescriptor;
+  Member<BluetoothRemoteGATTCharacteristic> m_characteristic;
+  Member<DOMDataView> m_value;

[ortuno, 2016/12/02 06:14:51]

No need for value yet.

[dougt, 2016/12/02 18:31:29]

Done.

+};
+
+}  // namespace blink
+
+#endif  // BluetoothRemoteGATTDescriptor_h