Revert of Touch emulator: overwrite timestamps from mouse event with current time.

content/browser/renderer_host/input/touch_emulator.cc

Index: content/browser/renderer_host/input/touch_emulator.cc
diff --git a/content/browser/renderer_host/input/touch_emulator.cc b/content/browser/renderer_host/input/touch_emulator.cc
index ac000eb31a19b5f7f0edcb290517f44ea7e6e658..42b43106c7861847092ca29d19443a0b0cdce726 100644
--- a/content/browser/renderer_host/input/touch_emulator.cc
+++ b/content/browser/renderer_host/input/touch_emulator.cc
@@ -316,7 +316,7 @@
   client_->ForwardGestureEvent(pinch_event_);
 }
 
-void TouchEmulator::FillPinchEvent(const WebGestureEvent& event) {
+void TouchEmulator::FillPinchEvent(const WebInputEvent& event) {
   pinch_event_.timeStampSeconds = event.timeStampSeconds;
   pinch_event_.modifiers = event.modifiers;
   pinch_event_.sourceDevice = blink::WebGestureEvent::Touchscreen;
@@ -360,16 +360,6 @@
   touch_event_.modifiers = mouse_event.modifiers;
   WebTouchEventTraits::ResetTypeAndTouchStates(
       eventType, mouse_event.timeStampSeconds, &touch_event_);
-
-  // On some platforms mouse event's timestamp does not necessarily relate to
-  // the system time at all, so use base::TimeTicks::HighResNow() if possible,
-  // or base::TimeTicks::Now() otherwise.
-  base::TimeTicks now;
-  if (base::TimeTicks::IsHighResNowFastAndReliable())
-    now = base::TimeTicks::HighResNow();
-  else
-    now = base::TimeTicks::Now();
-  touch_event_.timeStampSeconds = (now - base::TimeTicks()).InSecondsF();
 
   WebTouchPoint& point = touch_event_.touches[0];
   point.id = 0;