Part of fix for bug 8629392

Adding extra logging to fix cts bugs that are only on bots

Change-Id: I24b4b7aad200ffc23c002f4a8f0fe9246991c4f0

core/java/android/webkit/WebViewClassic.java

@@ -2149,7 +2149,8 @@ public final class WebViewClassic implements WebViewProvider, WebViewProvider.Sc
     @Override
     public void destroy() {
         if (mWebView.getViewRootImpl() != null) {
-            Log.e(LOGTAG, "Error: WebView.destroy() called while still attached!");
+            Log.e(LOGTAG, Log.getStackTraceString(
+                    new Throwable("Error: WebView.destroy() called while still attached!")));
         }
         ensureFunctorDetached();
         destroyJava();