Throw if webview has been destroyed

New APIs can be more strict about enforcing not being called after
destroy.

BUG=457184

Review URL: https://codereview.chromium.org/974143002

Cr-Commit-Position: refs/heads/master@{#319093}

android_webview/java/src/org/chromium/android_webview/AwContents.java

@@ -2090,8 +2090,12 @@ public class AwContents implements SmartClipProvider,
      * @param requestId an id that will be returned from the callback invocation to allow
      * callers to match requests with callbacks.
      * @param callback the callback to be inserted
+     * @throw IllegalStateException if this method is invoked after {@link #destroy()} has been
+     * called.
      */
     public void insertVisualStateCallback(long requestId, VisualStateCallback callback) {
+        if (isDestroyed()) throw new IllegalStateException(
+                "insertVisualStateCallback cannot be called after the WebView has been destroyed");
         nativeInsertVisualStateCallback(mNativeAwContents, requestId, callback);
     }