Revert "Add ticks counter to Timer."

pkg/dev_compiler/tool/input_sdk/private/preambles/d8.js

Index: pkg/dev_compiler/tool/input_sdk/private/preambles/d8.js
diff --git a/pkg/dev_compiler/tool/input_sdk/private/preambles/d8.js b/pkg/dev_compiler/tool/input_sdk/private/preambles/d8.js
index 0c432f514d0bec04a179a8853077b402c934f9ef..c330ad8fe4ae436de3456287b0850c9a3cf72609 100644
--- a/pkg/dev_compiler/tool/input_sdk/private/preambles/d8.js
+++ b/pkg/dev_compiler/tool/input_sdk/private/preambles/d8.js
@@ -85,7 +85,7 @@ if (typeof global != "undefined") self = global;  // Node.js.
     var id = timerIdCounter++;
     f.$timerId = id;
     timerIds[id] = f;
-    if (ms == 0 && !isNextTimerDue()) {
+    if (ms == 0) {
       zeroTimerQueue.push(f);
     } else {
       addDelayedTimer(f, ms);
@@ -134,10 +134,7 @@ if (typeof global != "undefined") self = global;  // Node.js.
   var originalDate = Date;
   var originalNow = originalDate.now;
   function advanceTimeTo(time) {
-    var now = originalNow();
-    if (timeOffset < time - now) {
-      timeOffset = time - now;
-    }
+    timeOffset = time - originalNow();
   }
   function installMockDate() {
     var NewDate = function Date(Y, M, D, h, m, s, ms) {
@@ -182,12 +179,6 @@ if (typeof global != "undefined") self = global;  // Node.js.
     }
   }
 
-  function isNextTimerDue() {
-    if (timerHeap.length == 0) return false;
-    var head = timerHeap[0];
-    return head[0] < originalNow() + timeOffset;
-  }
-
   function nextDelayedTimerQueue() {
     if (timerHeap.length == 0) return null;
     var result = timerHeap[0];