Deprecate query and queryAll, also add back querySelector and querySelectorAll.

tools/dom/src/dartium_Platform.dart

Index: tools/dom/src/dartium_Platform.dart
diff --git a/tools/dom/src/dartium_Platform.dart b/tools/dom/src/dartium_Platform.dart
index 34fdecced846032215b4712995dbfd2a21350526..ce54b0bae6d25568468ec19ee8a4e1b4658a0fe5 100644
--- a/tools/dom/src/dartium_Platform.dart
+++ b/tools/dom/src/dartium_Platform.dart
@@ -30,7 +30,7 @@ class Platform {
   static void upgradeCustomElements(Node node) {
     // no-op, provided for dart2js polyfill.
     if (node is Element) {
-      (node as Element).queryAll('*');
+      (node as Element).querySelectorAll('*');
     } else {
       node.nodes.forEach(upgradeCustomElements);
     }