Replace most /TR/ links in IDL files

third_party/WebKit/Source/core/events/InputEventInit.idl

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// UI Events
+// https://w3c.github.io/uievents/#idl-inputeventinit
+
 dictionary InputEventInit : UIEventInit {
-    // UI Events
-    // https://w3c.github.io/uievents/#idl-inputeventinit
     DOMString? data;
     boolean isComposing = false;
 
     // Input Events Level 1
     // https://www.w3.org/TR/2017/WD-input-events-1-20170321/#interface-InputEvent
     DOMString inputType = "";
     DataTransfer? dataTransfer;
     sequence<StaticRange> targetRanges = [];
 };