predictors: Add browsertests that check fetching through javascript.

chrome/test/data/predictors/inner_html.js

Index: chrome/test/data/predictors/inner_html.js
diff --git a/chrome/test/data/predictors/inner_html.js b/chrome/test/data/predictors/inner_html.js
new file mode 100644
index 0000000000000000000000000000000000000000..35806647508cbd15d456b5ee68c41f7dc4ca833b
--- /dev/null
+++ b/chrome/test/data/predictors/inner_html.js
@@ -0,0 +1,10 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+document.getElementById("img").innerHTML =
+  '<img src="/handled-by-test/image.png">';
+document.getElementById("css").innerHTML =
+  '<link rel="stylesheet" href="/handled-by-test/style.css">';
+document.getElementById("js").innerHTML =
+  '<script src="/handled-by-test/script.js"></script>';