Unhide 'window.console' by renaming console variable in layout tests

LayoutTests/media/encrypted-media/encrypted-media-utils.js

-var console = null;
+var consoleDiv = null;
 
 function consoleWrite(text)
 {
-    if (!console && document.body) {
-        console = document.createElement('div');
-        document.body.appendChild(console);
+    if (!consoleDiv && document.body) {
+        consoleDiv = document.createElement('div');
+        document.body.appendChild(consoleDiv);
     }
     var span = document.createElement('span');
     span.appendChild(document.createTextNode(text));
     span.appendChild(document.createElement('br'));
-    console.appendChild(span);
+    consoleDiv.appendChild(span);
 }
 
 // Returns a promise that is fulfilled with true if |initDataType| is supported,
 // or false if not.
 function isInitDataTypeSupported(initDataType)
 {
     return navigator.requestMediaKeySystemAccess(
                          "org.w3.clearkey", [{ initDataTypes : [initDataType] }])
         .then(function() { return(true); }, function() { return(false); });
 }
@@ skipping 266 matching lines @@
     video.play();
     return new Promise(function(resolve) {
         video.addEventListener('timeupdate', function listener(event) {
             if (event.target.currentTime < duration)
                 return;
             video.removeEventListener(listener);
             resolve('success');
         });
     });
 }