AnimatedType should hit |end|

sky/sdk/lib/animation/animation_performance.dart

Index: sky/sdk/lib/animation/animation_performance.dart
diff --git a/sky/sdk/lib/animation/animation_performance.dart b/sky/sdk/lib/animation/animation_performance.dart
index b857ee957efe4413bf11901f537ed5bfeb9f8348..7b7a96e5f70b19d7527c079bd17f747ce8990dc9 100644
--- a/sky/sdk/lib/animation/animation_performance.dart
+++ b/sky/sdk/lib/animation/animation_performance.dart
@@ -22,8 +22,12 @@ class AnimatedType<T extends dynamic> extends AnimatedVariable {
 
   void setFraction(double t) {
     if (end != null) {
-      // TODO(mpcomplete): Reverse the timeline and curve.
-      value = begin + (end - begin) * curve.transform(t);
+      if (t == 1.0) {
+        value = end;
+      } else {
+        // TODO(mpcomplete): Reverse the timeline and curve.
+        value = begin + (end - begin) * curve.transform(t);
+      }
     }
   }