bluetooth: Add BluetoothGATTCharacteristic IDL and Blink interface

public/platform/modules/bluetooth/WebBluetoothGATTCharacteristic.h

Index: public/platform/modules/bluetooth/WebBluetoothGATTCharacteristic.h
diff --git a/public/platform/modules/bluetooth/WebBluetoothGATTCharacteristic.h b/public/platform/modules/bluetooth/WebBluetoothGATTCharacteristic.h
new file mode 100644
index 0000000000000000000000000000000000000000..d7e7c5683ba6c76ec42c7cdcd36cd478c09acb0d
--- /dev/null
+++ b/public/platform/modules/bluetooth/WebBluetoothGATTCharacteristic.h
@@ -0,0 +1,35 @@
+// 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.
+
+#ifndef WebBluetoothGATTCharacteristic_h
+#define WebBluetoothGATTCharacteristic_h
+
+#include "public/platform/WebString.h"
+#include "public/web/WebArrayBuffer.h"
+
+namespace blink {
+
+// Contains members corresponding to BluetoothGATTCharacteristic attributes as
+// specified in the IDL.
+struct WebBluetoothGATTCharacteristic {
+    WebBluetoothGATTCharacteristic(const WebString& characteristicInstanceID,
+        const WebString& serviceInstanceID,
+        const WebString& uuid)
+        : characteristicInstanceID(characteristicInstanceID)
+        , serviceInstanceID(serviceInstanceID)
+        , uuid(uuid)
+    {
+    }
+
+    const WebString characteristicInstanceID;
+    const WebString serviceInstanceID;
+    const WebString uuid;
+    // TODO(ortuno): Add 'properties' once CharacteristicProperties is implemented.
+    // const WebCharacteristicProperties properties;
+    const WebArrayBuffer value;

[tasak, 2015/06/24 05:36:04]

WebArrayBuffer is placed under public/web, but this file is placed under
public/platform.
This is not correct.

[ortuno, 2015/06/24 16:48:12]

Changing it to WebVector wouldn't be too hard. But there really should be a DEPS
rule or a presubmit check if this is not supposed to be allowed.

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