fix(ngAnimate): support removing classes from SVG elements when using jQuery

Without this CL, ngShowHide will not work without the use of monkeypatched fixes for jQuery such as
https://github.com/kbwood/svg 's jquery-svgdom.js script.

Closes angular#8872

Author: caitp

src/ngAnimate/animate.js

@@ -494,7 +494,7 @@ angular.module('ngAnimate', ['ng'])
 
         var toAdd = [], toRemove = [];
         forEach(map, function(status, className) {
-          var hasClass = element.hasClass(className);
+          var hasClass = nodeHasClass(element[0], className);
           var matchingAnimation = lookup[className] || {};
 
           // When addClass and removeClass is called then $animate will check to
@@ -1869,3 +1869,9 @@ angular.module('ngAnimate', ['ng'])
       }
     }]);
   }]);
+
+function nodeHasClass(element, selector) {
+  if (!element.getAttribute) return false;
+  return ((" " + (element.getAttribute('class') || '') + " ").replace(/[\n\t]/g, " ").
+    indexOf( " " + selector + " " ) > -1);
+}

test/ngAnimate/animateSpec.js

@@ -4641,6 +4641,18 @@ describe("ngAnimate", function() {
         expect(child.hasClass('ng-enter')).toBe(false);
         expect(child.hasClass('ng-enter-active')).toBe(false);
       }));
+
+
+      it('should properly remove classes from SVG elements', inject(function($animate, $rootScope) {
+        var element = jqLite('<svg width="500" height="500"><rect class="class-of-doom"></rect></svg>');
+        var child = element.find('rect');
+        $animate.removeClass(child, 'class-of-doom');
+
+        $rootScope.$digest();
+        expect(child.attr('class')).toBe('');
+
+        dealoc(element);
+      }));
     });
   });
 });