bluetooth: Fix crash when accepting location permission

chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java

Index: chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java b/chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java
index 3d2289f72f0c2c0c2eab6654c7adfd8fb1cf3845..4e30d9bd9576dcfd1e9be861817cff331d685910 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java
@@ -186,6 +186,11 @@ public class BluetoothChooserDialog
 
     @Override
     public void onRequestPermissionsResult(String[] permissions, int[] grantResults) {
+        // The chooser might have been closed during the request.
+        if (mNativeBluetoothChooserDialogPtr == 0) {
+            return;
+        }
+
         for (int i = 0; i < permissions.length; i++) {
             if (permissions[i].equals(Manifest.permission.ACCESS_COARSE_LOCATION)) {
                 if (checkLocationServicesAndPermission()) {