Possible fix for bug b/11114227: Occasional crash on rotation

Checking the View has a parent before sending the longclick.
Manually cherry-picked from klp-dev:
(Change-Id: I6d4ff5d5b726d1d1220891099754195e2616dd8b)

Change-Id: I5de2f6b052b6c1262af87678321a35317721a3e0
diff --git a/chromium/java/com/android/webview/chromium/WebViewChromium.java b/chromium/java/com/android/webview/chromium/WebViewChromium.java
index 3368d58..2832278 100644
--- a/chromium/java/com/android/webview/chromium/WebViewChromium.java
+++ b/chromium/java/com/android/webview/chromium/WebViewChromium.java
@@ -1523,7 +1523,8 @@
             });
             return ret;
         }
-        return mWebViewPrivate.super_performLongClick();
+        // Return false unless the WebView is attached to a View with a parent
+        return mWebView.getParent() != null ? mWebViewPrivate.super_performLongClick() : false;
     }
 
     @Override