Fix getting notified twice after subscribe to notifications and call readValue

device/bluetooth/bluetooth_remote_gatt_characteristic_android.cc

 // 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.
 
 #include "device/bluetooth/bluetooth_remote_gatt_characteristic_android.h"
 
 #include <memory>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
@@ skipping 184 matching lines @@
 
   // Clear callbacks before calling to avoid reentrancy issues.
   ValueCallback read_callback = read_callback_;
   ErrorCallback read_error_callback = read_error_callback_;
   read_callback_.Reset();
   read_error_callback_.Reset();
 
   if (status == 0  // android.bluetooth.BluetoothGatt.GATT_SUCCESS
       && !read_callback.is_null()) {
     base::android::JavaByteArrayToByteVector(env, value, &value_);
-    adapter_->NotifyGattCharacteristicValueChanged(this, value_);
     read_callback.Run(value_);
   } else if (!read_error_callback.is_null()) {
     read_error_callback.Run(
         BluetoothRemoteGattServiceAndroid::GetGattErrorCode(status));
   }
 }
 
 void BluetoothRemoteGattCharacteristicAndroid::OnWrite(
     JNIEnv* env,
     const JavaParamRef<jobject>& jcaller,
@@ skipping 83 matching lines @@
 void BluetoothRemoteGattCharacteristicAndroid::EnsureDescriptorsCreated()
     const {
   if (!descriptors_.empty())
     return;
 
   Java_ChromeBluetoothRemoteGattCharacteristic_createDescriptors(
       AttachCurrentThread(), j_characteristic_);
 }
 
 }  // namespace device