Removed Window.focus and Window.blur as they are no longer recommended.

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index 1e7dbf5fa96bc75507f4e563d35361907988d63a..3ca29f9685805156e7a10505c97ec256dba6bfef 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -12120,9 +12120,6 @@ class LocalWindow extends EventTarget implements Window native "@*DOMWindow" {
   /** @domName Window.atob */
   String atob(String string) native;
 
-  /** @domName Window.blur */
-  void blur() native;
-
   /** @domName Window.btoa */
   String btoa(String string) native;
 
@@ -12147,9 +12144,6 @@ class LocalWindow extends EventTarget implements Window native "@*DOMWindow" {
   /** @domName Window.find */
   bool find(String string, bool caseSensitive, bool backwards, bool wrap, bool wholeWord, bool searchInFrames, bool showDialog) native;
 
-  /** @domName Window.focus */
-  void focus() native;
-
   /** @domName Window.getComputedStyle */
   CSSStyleDeclaration $dom_getComputedStyle(Element element, String pseudoElement) native "getComputedStyle";
 
@@ -22153,8 +22147,6 @@ abstract class Window {
   Window get top;
 
   // Methods.
-  void focus();
-  void blur();
   void close();
   void postMessage(var message, String targetOrigin, [List messagePorts = null]);
 }