Issue #1517 - Remove dom.event.highrestimestamp.enabled pref

This resolves #1517

dom/events/Event.cpp

@@ -45,9 +45,6 @@ extern bool IsCurrentThreadRunningChromeWorker();
 
 static char *sPopupAllowedEvents;
 
-static bool sReturnHighResTimeStamp = false;
-static bool sReturnHighResTimeStampIsSet = false;
-
 Event::Event(EventTarget* aOwner,
              nsPresContext* aPresContext,
              WidgetEvent* aEvent)
@@ -68,13 +65,6 @@ Event::ConstructorInit(EventTarget* aOwner,
   SetOwner(aOwner);
   mIsMainThreadEvent = NS_IsMainThread();
 
-  if (mIsMainThreadEvent && !sReturnHighResTimeStampIsSet) {
-    Preferences::AddBoolVarCache(&sReturnHighResTimeStamp,
-                                 "dom.event.highrestimestamp.enabled",
-                                 sReturnHighResTimeStamp);
-    sReturnHighResTimeStampIsSet = true;
-  }
-
   mPrivateDataDuplicated = false;
   mWantsPopupControlCheck = false;
 
@@ -1093,10 +1083,6 @@ Event::TimeStamp() const
 double
 Event::TimeStampImpl() const
 {
-  if (!sReturnHighResTimeStamp) {
-    return static_cast<double>(mEvent->mTime);
-  }
-
   if (mEvent->mTimeStamp.IsNull()) {
     return 0.0;
   }

dom/events/test/test_eventTimeStamp.html

@@ -35,12 +35,6 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=77992
 SimpleTest.waitForExplicitFinish();
 SimpleTest.requestFlakyTimeout("untriaged");
 
-// We don't use SpecialPowers.pushPrefEnv since it can delay the test
-// function until after the load event has fired which means we can't
-// test the timestamp of the load event.
-const kPrefName = "dom.event.highrestimestamp.enabled";
-var prevPrefValue = SpecialPowers.getBoolPref(kPrefName);
-SpecialPowers.setBoolPref(kPrefName, true);
 testRegularEvents();
 
 // Event.timeStamp should be relative to the time origin which is:

dom/smil/test/test_smilTimeEvents.xhtml

@@ -236,14 +236,10 @@ function sanityCheckEvent(evt)
   is(evt.eventPhase, evt.AT_TARGET);
   is(evt.bubbles, false, "Event should not bubble");
   is(evt.cancelable, false, "Event should not be cancelable");
-  if (SpecialPowers.getBoolPref("dom.event.highrestimestamp.enabled")) {
-    var now = window.performance.now();
-    ok(evt.timeStamp > 0 && evt.timeStamp < now,
-       "Event timeStamp (" + evt.timeStamp + ") should be > 0 but " +
-       "before the current time (" + now + ")");
-  } else {
-    is(evt.timeStamp, 0, "Event timeStamp should be 0");
-  }
+  var now = window.performance.now();
+  ok(evt.timeStamp > 0 && evt.timeStamp < now,
+     "Event timeStamp (" + evt.timeStamp + ") should be > 0 but " +
+     "before the current time (" + now + ")");
   ok(evt.view !== null, "Event view not set");
 }
 

editor/libeditor/tests/test_dom_input_event_on_htmleditor.html

@@ -67,21 +67,11 @@ function runTests()
          "input event is fired on unexpected element: " + aEvent.target.tagName);
       ok(!aEvent.cancelable, "input event must not be cancelable");
       ok(aEvent.bubbles, "input event must be bubbles");
-      if (SpecialPowers.getBoolPref("dom.event.highrestimestamp.enabled")) {
-        var duration = Math.abs(window.performance.now() - aEvent.timeStamp);
-        ok(duration < 30 * 1000,
-           "perhaps, timestamp wasn't set correctly :" + aEvent.timeStamp +
-           " (expected it to be within 30s of the current time but it " +
-           "differed by " + duration + "ms)");
-      } else {
-        var eventTime = new Date(aEvent.timeStamp);
-        var duration = Math.abs(Date.now() - aEvent.timeStamp);
-        ok(duration < 30 * 1000,
-           "perhaps, timestamp wasn't set correctly :" +
-           eventTime.toLocaleString() +
-           " (expected it to be within 30s of the current time but it " +
-           "differed by " + duration + "ms)");
-      }
+      var duration = Math.abs(window.performance.now() - aEvent.timeStamp);
+      ok(duration < 30 * 1000,
+         "perhaps, timestamp wasn't set correctly :" + aEvent.timeStamp +
+         " (expected it to be within 30s of the current time but it " +
+         "differed by " + duration + "ms)");
       inputEvent = aEvent;
     };
 

editor/libeditor/tests/test_dom_input_event_on_texteditor.html

@@ -41,21 +41,11 @@ function runTests()
          "input event is fired on unexpected element: " + aEvent.target.tagName);
       ok(!aEvent.cancelable, "input event must not be cancelable");
       ok(aEvent.bubbles, "input event must be bubbles");
-      if (SpecialPowers.getBoolPref("dom.event.highrestimestamp.enabled")) {
-        var duration = Math.abs(window.performance.now() - aEvent.timeStamp);
-        ok(duration < 30 * 1000,
-           "perhaps, timestamp wasn't set correctly :" + aEvent.timeStamp +
-           " (expected it to be within 30s of the current time but it " +
-           "differed by " + duration + "ms)");
-      } else {
-        var eventTime = new Date(aEvent.timeStamp);
-        var duration = Math.abs(Date.now() - aEvent.timeStamp);
-        ok(duration < 30 * 1000,
-           "perhaps, timestamp wasn't set correctly :" +
-           eventTime.toLocaleString() +
-           " (expected it to be within 30s of the current time but it " +
-           "differed by " + duration + "ms)");
-      }
+      var duration = Math.abs(window.performance.now() - aEvent.timeStamp);
+      ok(duration < 30 * 1000,
+         "perhaps, timestamp wasn't set correctly :" + aEvent.timeStamp +
+         " (expected it to be within 30s of the current time but it " +
+         "differed by " + duration + "ms)");
       inputEvent = aEvent;
     };
 

modules/libpref/init/all.js

@@ -1247,7 +1247,6 @@ pref("privacy.trackingprotection.pbmode.enabled",  false);
 
 pref("dom.event.contextmenu.enabled",       true);
 pref("dom.event.clipboardevents.enabled",   true);
-pref("dom.event.highrestimestamp.enabled",  true);
 
 pref("dom.webcomponents.enabled",           false);