remove rAF and fix tests on IE10

src/util/env.js

@@ -37,11 +37,7 @@ if (typeof WebkitMutationObserver !== 'undefined') {
 if (typeof setImmediate !== 'undefined') {
   defer = setImmediate
 } else {
-  defer = inBrowser
-    ? (window.requestAnimationFrame ||
-      window.webkitRequestAnimationFrame ||
-      setTimeout)
-    : setTimeout
+  defer = setTimeout
 }
 
 /* istanbul ignore next */

test/unit/specs/transition/transition_spec.js

@@ -210,23 +210,20 @@ if (_.inBrowser && !_.isIE9) {
         el.__v_trans.id = 'test'
         // cascaded class style
         el.classList.add('test')
-        // wait a frame before applying the transition
-        // because doing so in the same frame won't trigger
-        // transition
-        setTimeout(function () {
-          transition.apply(el, -1, op, vm, cb)
-          _.nextTick(function () {
-            expect(op).not.toHaveBeenCalled()
-            expect(cb).not.toHaveBeenCalled()
-            expect(el.classList.contains('test-leave')).toBe(true)
-            _.on(el, _.transitionEndEvent, function () {
-              expect(op).toHaveBeenCalled()
-              expect(cb).toHaveBeenCalled()
-              expect(el.classList.contains('test-leave')).toBe(false)
-              done()
-            })
+        // force a layout here so the transition can be triggered
+        var f = el.offsetHeight
+        transition.apply(el, -1, op, vm, cb)
+        _.nextTick(function () {
+          expect(op).not.toHaveBeenCalled()
+          expect(cb).not.toHaveBeenCalled()
+          expect(el.classList.contains('test-leave')).toBe(true)
+          _.on(el, _.transitionEndEvent, function () {
+            expect(op).toHaveBeenCalled()
+            expect(cb).toHaveBeenCalled()
+            expect(el.classList.contains('test-leave')).toBe(false)
+            done()
           })
-        }, 0)
+        })
       })
 
       it('animation enter', function (done) {