WIP fix tests

src/layout/layout.js

@@ -141,7 +141,7 @@
 
   var mediaQuery = MaterialLayout.prototype.matchMedia_(
     /** @type {string} */ (MaterialLayout.prototype.Constant_.MAX_WIDTH));
-  mediaQuery.onchange = screenSizeHandler;
+  mediaQuery.onchange = MaterialLayout.prototype.screenSizeHandler_;
 
   MaterialLayout.prototype.screenSizeMediaQuery_ = mediaQuery;
 
@@ -196,7 +196,7 @@
    * @private
    */
 
-  function screenSizeHandler(e) {
+  MaterialLayout.prototype.screenSizeHandler_ = function(e) {
     // modified to query dependent elements rather than binding materialLayout to windows media query result
     var materialLayouts = document.querySelectorAll('.mdl-layout');
 
@@ -227,7 +227,7 @@
         }
       }
     }
-  }
+  };
   /**
    * Handles events of drawer button.
    *
@@ -450,7 +450,7 @@
       // Keep an eye on screen size, and add/remove auxiliary class for styling
       // of small screens.
 
-      screenSizeHandler(this.screenSizeMediaQuery_);
+      this.screenSizeHandler_(this.screenSizeMediaQuery_);
 
       // Initialize tabs, if any.
       if (this.header_ && this.tabBar_) {