Replace most /TR/ links in IDL files

third_party/WebKit/Source/core/animation/ElementAnimation.idl

Index: third_party/WebKit/Source/core/animation/ElementAnimation.idl
diff --git a/third_party/WebKit/Source/core/animation/ElementAnimation.idl b/third_party/WebKit/Source/core/animation/ElementAnimation.idl
index 018a7afdfe319990b46f8940bf2b2322aa421a35..025edd4ef2f0040a669c13e6a6872be39e643b12 100644
--- a/third_party/WebKit/Source/core/animation/ElementAnimation.idl
+++ b/third_party/WebKit/Source/core/animation/ElementAnimation.idl
@@ -28,14 +28,14 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-// http://www.w3.org/TR/web-animations/#the-animatable-interface
-// http://www.w3.org/TR/web-animations/#extensions-to-the-element-interface
+// https://w3c.github.io/web-animations/#the-animatable-interface
+// https://w3c.github.io/web-animations/#extensions-to-the-element-interface
 
 // TODO(dstockwell): This should be an Animatable interface, where Element
-// implements Animatable. The interface also has several changes:
-// https://w3c.github.io/web-animations/#the-animatable-interface
+// implements Animatable.
 
 partial interface Element {
+    // TODO(dstockwell): The argument types do not match the spec.
     [CallWith=ScriptState, Measure, RaisesException] Animation animate((sequence<Dictionary> or Dictionary)? effect, optional (unrestricted double or KeyframeEffectOptions) options);
     [RuntimeEnabled=WebAnimationsAPI] sequence<Animation> getAnimations();
 };