title: Using a graph file (.pb file) with tensorflow js for prediction
body: <p>I'm just getting started with <a href="https://js.tensorflow.org/" rel="nofollow noreferrer">TensorFlow.JS</a>. 
  I'm have a sample ".pb" file in my directory, which is a trained model. I'm trying to load this model to use it for prediction in one of a sample machine learning app I'm trying to build in the browser. As my understanding in this topic is very minimal, I could not find any useful information regarding this in the documentation. I've tried using </p>
  
  <pre><code>tf.loadModel(Model_URL, Weights_URL)
  </code></pre>
  
  <p>But giving the file path to this is throwing this error : </p>
  
  <blockquote>
    <p>URL scheme "file" is not supported.</p>
  </blockquote>
  
  <p>Can anyone help me load this .pb file in the browser using Tfjs ? </p>