Allow to override cookies in console waterfall with GET parameter.

masters/master.chromium/templates/console.html

 {% extends "announce.html" %}
 
 {% block head %}
 {{ super() }}
 <script type='text/javascript'>
 // <![CDATA[
 //
 
 //
 // Functions used to display the build status bubble on box click.
@@ skipping 53 matching lines @@
 // like in an empty table cell.
 function checkMouseLeave(element, event) {
   if (element.contains && event.toElement) {
     return !element.contains(event.toElement);
   }
   else if (event.relatedTarget) {
     return !containsDOM(element, event.relatedTarget);
   }
 }
 
+// Returns the value of a GET parameter, or null if it does not exist.
+function readGetParameter(name) {
+  var begin = name + '=';
+  var data = location.search;
+  if (data === '') {
+    return null;
+  }
+  // Location starts with "?".
+  data = data.substr(1);
+  var parameters = data.split('&');
+  var foundElement = parameters.find( (parameter) => {
+    return parameter.indexOf(begin) == 0;
+  });
+  if (foundElement) {
+    return decodeURIComponent(foundElement.substr(begin.length));
+  }
+  return null;
+}
+
 // Creates a new cookie.
 function createCookie(name, value, day) {
     var date = new Date();
     date.setTime(date.getTime() + (day * 24 * 60 * 60 * 1000));
     var expires = "; expires=" + date.toGMTString();
     document.cookie = name + "=" + value+expires + "; path=/";
 }
 
-// Returns the vaue of a cookie, or null if it does not exist.
+// Returns the value of a cookie, or null if it does not exist.
 function readCookie(name) {
     var begin = name + "=";
     var data = document.cookie.split(';');
     for(var i = 0; i < data.length; i++) {
         var cookie = data[i];
         while (cookie.charAt(0) == ' ')
             cookie = cookie.substring(1, cookie.length);
         if (cookie.indexOf(begin) == 0)
             return cookie.substring(begin.length, cookie.length);
     }
@@ skipping 171 matching lines @@
     eraseCookie('merged')
 
     // Display the "merge" button.
     document.querySelectorAll('.merge')[0].style.display = 'inline'
 
     // Hide the "unmerge" button.
     document.querySelectorAll('.unmerge')[0].style.display = 'none'
 }
 
 function SetupView() {
+    // Allow override cookies with Get parameters.
+    var getMerged = readGetParameter('merged');
+    if (getMerged === 'true') {
+        createCookie('merged', 'true', 30);
+    }
+    if (getMerged === 'false') {
+        eraseCookie('merged');
+    }
+    var getCollapsed = readGetParameter('collapsed');
+    if (getCollapsed === 'true') {
+        createCookie('collapsed', 'true', 30);
+    }
+    if (getCollapsed === 'false') {
+        eraseCookie('collapsed');
+    }
+
     if (readCookie('merged')) {
         merge();
     } else if (readCookie('collapsed')) {
         collapse();
     }
 }
 
 document.addEventListener("DOMContentLoaded", SetupView, false);
 
 // ]]> 
@@ skipping 186 matching lines @@
 {% block footer %}
 <div class="footer" style="clear:both">
   <hr/>
   [ <a class='collapse' href='#' OnClick='collapse(); return false;'>collapse</a>
   <a class='uncollapse' href='#' OnClick='uncollapse(); return false;'>un-collapse</a>
   <a class='merge' href="#" OnClick="merge(); return false;">merge</a>
   <a class='unmerge' style='display: none' href="#" OnClick="unmerge(); return false;">un-merge</a> ]
   <p>Debug info: {{ debuginfo }}</p>
 </div>
 {% endblock %}