[NaCl SDK AppEngine] Add a fullscreen bullet demo.

native_client_sdk/src/gonacl_appengine/static/styles/style.css

 /* Copyright (c) 2013 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. */
 
 * {
   box-sizing: border-box;
   -webkit-font-smoothing:antialiased;
 }
 
 html, body {
@@ skipping 98 matching lines @@
   width: 100%;
   height: 0;
   border-bottom: 1px solid #FFF;
   position: absolute;
   left: 0;
   bottom: -2px;
 }
 
 section {
   padding: 25px;
-  flex: 1 0 auto;
+  flex: 1 1 auto;
   display: flex;
   flex-direction: column;
 }
 
 section iframe {
   box-shadow: 0 1px 1px rgba(0,0,0,0.3);
   width: 100%;
   height: 100%;
   background: #FFF;
   flex: 1 1 auto;
@@ skipping 43 matching lines @@
 }
 
 /** Demo **/
 
 .demo {
   background: #FFF;
   flex-direction: column;
 }
 
 .demo header {
-  flex: 0 0 auto;
+  flex: 0 1 auto;
   padding: 15px 25px;
 }
 
 .demo header h1 {
   margin: 0;
   font-family: 'Open Sans';
   font-weight: 300;
   color: #666;
   font-size: 62px;
   letter-spacing: -0.05em;
@@ skipping 186 matching lines @@
   height: 40px;
   background: #6DD900;
   transition: width 0.1s ease-out;
 }
 
 .demo .credit {
   margin-top: 20px;
   font-size: 10px;
   color: #AAA;
 }