bluetooth: Update BluetoothGATTCharacteristic.value on writeValue

content/renderer/bluetooth/bluetooth_dispatcher.cc

 // Copyright 2014 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.
 
 #include "content/renderer/bluetooth/bluetooth_dispatcher.h"
 
 #include <stddef.h>
 
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 645 matching lines @@
                                            int request_id,
                                            WebBluetoothError error) {
   DCHECK(pending_read_value_requests_.Lookup(request_id)) << request_id;
 
   pending_read_value_requests_.Lookup(request_id)
       ->onError(WebBluetoothError(error));
 
   pending_read_value_requests_.Remove(request_id);
 }
 
-void BluetoothDispatcher::OnWriteValueSuccess(int thread_id, int request_id) {
+void BluetoothDispatcher::OnWriteValueSuccess(
+    int thread_id,
+    int request_id,
+    const std::vector<uint8_t>& value) {

[ortuno, 2016/01/20 16:34:40]

I don't think you need to send back the value. You can add a
CharacteristicWriteValueRequest struct and save the value there; we do something
similar for getPrimaryService and getCharacteristic.

   DCHECK(pending_write_value_requests_.Lookup(request_id)) << request_id;
 
-  pending_write_value_requests_.Lookup(request_id)->onSuccess();
+  pending_write_value_requests_.Lookup(request_id)->onSuccess(value);
 
   pending_write_value_requests_.Remove(request_id);
 }
 
 void BluetoothDispatcher::OnWriteValueError(int thread_id,
                                             int request_id,
                                             WebBluetoothError error) {
   DCHECK(pending_write_value_requests_.Lookup(request_id)) << request_id;
 
   pending_write_value_requests_.Lookup(request_id)
@@ skipping 82 matching lines @@
     int thread_id,
     const std::string& characteristic_instance_id,
     const std::vector<uint8_t> new_value) {
   auto active_iter = active_characteristics_.find(characteristic_instance_id);
   if (active_iter != active_characteristics_.end()) {
     active_iter->second->dispatchCharacteristicValueChanged(new_value);
   }
 }
 
 }  // namespace content