Revert "Project import generated by Copybara."

This reverts commit 54cca78d64.

include/jsguide.js

@@ -0,0 +1,56 @@
+window.initStyleGuide = function(init) {
+  // Runs the callback on every element matched by the query selector.
+  function find(querySelector, callback) {
+    var elements = [].slice.call(document.querySelectorAll(querySelector));
+    for (var i = 0; i < elements.length; i++) {
+      callback(elements[i]);
+    }
+  }
+  // Add the tocDiv at the top.
+  var title = document.getElementsByTagName('h1')[0];
+  var toc = document.createElement('div');
+  toc.id = 'tocDiv';
+  toc.className = 'vertical_toc';
+  title.parentNode.insertBefore(toc, title.nextSibling);
+
+  // If a paragraph starts with (e.g.) "Note:" or "Tip:" then add
+  // that "callout class" to its element.
+  find('p', function(paragraph) {
+    var match = /^([a-z]+):/i.exec(paragraph.textContent);
+    if (match) {
+      paragraph.classList.add(match[1].toLowerCase());
+    }
+  });
+
+  // Fill in text for intra-document links, ensuring that links
+  // remain up-to-date even if sections are moved or renumbered.
+  // This triggers on any link with "??" as its text and a URL
+  // starting with "#", and the filled-in text is exactly the same
+  // as the text of the referenced section heading.
+  find('a[href^="#"]', function(link) {
+    var href = link.getAttribute('href');
+    var heading = document.getElementById(href.substring(1));
+    // Fill in link text with heading title
+    if (heading && link.textContent == '??') {
+      link.textContent = heading.textContent;
+    }
+  });
+
+  // Hoedown renders fenced code blocks incompatibly with what
+  // prettify expects. As a result, prettify doesn't handle them
+  // properly. Fix it by moving the code directly into the pre.
+  find('pre > code', function(code) {
+    var pre = code.parentElement;
+    pre.className = code.className;
+    pre.innerHTML = code.innerHTML;
+  });
+
+  // Run the normal init function.
+  init();
+
+  // Call the pretty-printer after we've fixed up the code blocks.
+  var pretty = document.createElement('script');
+  pretty.src = 'https://cdn.rawgit.com/google/code-prettify/master/loader/' +
+      'run_prettify.js';
+  document.body.appendChild(pretty);
+}.bind(null, window.initStyleGuide);