Fix chrome not to blur on mouseout/focusout

may be related to https://code.google.com/p/chromium/issues/detail?id=321264 ?

src/ol/control/fullscreencontrol.js

@@ -52,6 +52,13 @@ ol.control.FullScreen = function(opt_options) {
     goog.events.EventType.TOUCHEND
   ], this.handleClick_, false, this);
 
+  goog.events.listen(button, [
+    goog.events.EventType.MOUSEOUT,
+    goog.events.EventType.FOCUSOUT
+  ], function() {
+    this.blur();
+  }, false);
+
   goog.events.listen(goog.global.document, goog.dom.fullscreen.EventType.CHANGE,
       this.handleFullScreenChange_, false, this);
 

src/ol/control/zoomcontrol.js

@@ -56,6 +56,13 @@ ol.control.Zoom = function(opt_options) {
     goog.events.EventType.CLICK
   ], goog.partial(ol.control.Zoom.prototype.zoomByDelta_, delta), false, this);
 
+  goog.events.listen(inElement, [
+    goog.events.EventType.MOUSEOUT,
+    goog.events.EventType.FOCUSOUT
+  ], function() {
+    this.blur();
+  }, false);
+
   var tTipsZoomOut = goog.dom.createDom(goog.dom.TagName.SPAN, {
     'role' : 'tooltip',
     'type' : 'button'
@@ -69,6 +76,13 @@ ol.control.Zoom = function(opt_options) {
     goog.events.EventType.CLICK
   ], goog.partial(ol.control.Zoom.prototype.zoomByDelta_, -delta), false, this);
 
+  goog.events.listen(outElement, [
+    goog.events.EventType.MOUSEOUT,
+    goog.events.EventType.FOCUSOUT
+  ], function() {
+    this.blur();
+  }, false);
+
   var cssClasses = className + ' ' + ol.css.CLASS_UNSELECTABLE;
   var element = goog.dom.createDom(goog.dom.TagName.DIV, cssClasses, inElement,
       outElement);

src/ol/control/zoomtoextentcontrol.js

@@ -52,6 +52,13 @@ ol.control.ZoomToExtent = function(opt_options) {
     goog.events.EventType.CLICK
   ], this.handleZoomToExtent_, false, this);
 
+  goog.events.listen(button, [
+    goog.events.EventType.MOUSEOUT,
+    goog.events.EventType.FOCUSOUT
+  ], function() {
+    this.blur();
+  }, false);
+
   goog.base(this, {
     element: element,
     target: options.target