bluetooth: Save characteristic value when notification arrives

device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothDevice.java

Index: device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothDevice.java
diff --git a/device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothDevice.java b/device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothDevice.java
index 5ef691323b78b9b97b3d95102d4951adb5d92fab..1059c039324c7f8f0e17303ebf9f88393a532c36 100644
--- a/device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothDevice.java
+++ b/device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothDevice.java
@@ -196,6 +196,9 @@ final class ChromeBluetoothDevice {
         public void onCharacteristicChanged(
                 final Wrappers.BluetoothGattCharacteristicWrapper characteristic) {
             Log.i(TAG, "device onCharacteristicChanged.");
+            // Copy the characteristic's value for this event so that new notifications that
+            // arrive before the posted task runs do not affect this event's value.
+            final byte[] value = characteristic.getValue();
             Wrappers.ThreadUtilsWrapper.getInstance().runOnUiThread(new Runnable() {
                 @Override
                 public void run() {
@@ -206,7 +209,7 @@ final class ChromeBluetoothDevice {
                         // when the event races object destruction.
                         Log.v(TAG, "onCharacteristicChanged when chromeCharacteristic == null.");
                     } else {
-                        chromeCharacteristic.onCharacteristicChanged();
+                        chromeCharacteristic.onCharacteristicChanged(value);
                     }
                 }
             });