Implement WebBluetooth getDescriptor[s]

content/renderer/bluetooth/web_bluetooth_impl.cc

Index: content/renderer/bluetooth/web_bluetooth_impl.cc
diff --git a/content/renderer/bluetooth/web_bluetooth_impl.cc b/content/renderer/bluetooth/web_bluetooth_impl.cc
index ec557d632c6fb3cfb12db623882b801e6d0de915..cf7ccdc9020e6376746e62b65ac4f1650d327df3 100644
--- a/content/renderer/bluetooth/web_bluetooth_impl.cc
+++ b/content/renderer/bluetooth/web_bluetooth_impl.cc
@@ -21,6 +21,7 @@
 #include "third_party/WebKit/public/platform/modules/bluetooth/WebBluetoothDeviceInit.h"
 #include "third_party/WebKit/public/platform/modules/bluetooth/WebBluetoothRemoteGATTCharacteristic.h"
 #include "third_party/WebKit/public/platform/modules/bluetooth/WebBluetoothRemoteGATTCharacteristicInit.h"
+#include "third_party/WebKit/public/platform/modules/bluetooth/WebBluetoothRemoteGATTDescriptorInit.h"
 #include "third_party/WebKit/public/platform/modules/bluetooth/WebBluetoothRemoteGATTService.h"
 #include "third_party/WebKit/public/platform/modules/bluetooth/WebRequestDeviceOptions.h"
 
@@ -112,7 +113,7 @@ void WebBluetoothImpl::getCharacteristics(
                  base::Passed(base::WrapUnique(callbacks))));
 }
 
-void WebBluetoothImpl::readValue(
+void WebBluetoothImpl::characteristicReadValue(
     const blink::WebString& characteristic_instance_id,
     blink::WebBluetoothReadValueCallbacks* callbacks) {
   GetWebBluetoothService().RemoteCharacteristicReadValue(
@@ -121,7 +122,7 @@ void WebBluetoothImpl::readValue(
                  base::Passed(base::WrapUnique(callbacks))));
 }
 
-void WebBluetoothImpl::writeValue(
+void WebBluetoothImpl::characteristicWriteValue(
     const blink::WebString& characteristic_instance_id,
     const blink::WebVector<uint8_t>& value,
     blink::WebBluetoothWriteValueCallbacks* callbacks) {
@@ -153,6 +154,25 @@ void WebBluetoothImpl::stopNotifications(
                  base::Passed(base::WrapUnique(callbacks))));
 }
 
+void WebBluetoothImpl::getDescriptors(
+    const blink::WebString& characteristic_instance_id,
+    int32_t quantity,
+    const blink::WebString& descriptors_uuid,
+    blink::WebBluetoothGetDescriptorsCallbacks* callbacks) {
+  DCHECK(blink::mojom::IsKnownEnumValue(
+      static_cast<blink::mojom::WebBluetoothGATTQueryQuantity>(quantity)));
+
+  GetWebBluetoothService().RemoteCharacteristicGetDescriptors(
+      mojo::String::From(characteristic_instance_id),
+      static_cast<blink::mojom::WebBluetoothGATTQueryQuantity>(quantity),
+      descriptors_uuid.isEmpty()
+          ? base::nullopt
+          : base::make_optional(device::BluetoothUUID(descriptors_uuid.utf8())),
+      base::Bind(&WebBluetoothImpl::OnGetDescriptorsComplete,
+                 base::Unretained(this), characteristic_instance_id,
+                 base::Passed(base::WrapUnique(callbacks))));
+}
+
 void WebBluetoothImpl::characteristicObjectRemoved(
     const blink::WebString& characteristic_instance_id,
     blink::WebBluetoothRemoteGATTCharacteristic* characteristic) {
@@ -267,6 +287,29 @@ void WebBluetoothImpl::OnGetCharacteristicsComplete(
   }
 }
 
+void WebBluetoothImpl::OnGetDescriptorsComplete(
+    const blink::WebString& characteristic_instance_id,
+    std::unique_ptr<blink::WebBluetoothGetDescriptorsCallbacks> callbacks,
+    blink::mojom::WebBluetoothResult result,
+    base::Optional<
+        std::vector<blink::mojom::WebBluetoothRemoteGATTDescriptorPtr>>
+        descriptors) {
+  if (result == blink::mojom::WebBluetoothResult::SUCCESS) {
+    DCHECK(descriptors);
+    // TODO(dcheng): This WebVector should use smart pointers.
+    blink::WebVector<blink::WebBluetoothRemoteGATTDescriptorInit*>
+        promise_descriptors(descriptors->size());
+    for (size_t i = 0; i < descriptors->size(); i++) {
+      promise_descriptors[i] = new blink::WebBluetoothRemoteGATTDescriptorInit(
+          blink::WebString::fromUTF8(descriptors.value()[i]->instance_id),
+          blink::WebString::fromUTF8(descriptors.value()[i]->uuid));
+    }
+    callbacks->onSuccess(promise_descriptors);
+  } else {
+    callbacks->onError(ToInt32(result));
+  }
+}
+
 void WebBluetoothImpl::OnReadValueComplete(
     std::unique_ptr<blink::WebBluetoothReadValueCallbacks> callbacks,
     blink::mojom::WebBluetoothResult result,