Use WTF::TimeTicks to represent timestamp in Platform/Core event types

third_party/WebKit/Source/core/input/GestureManager.cpp

Index: third_party/WebKit/Source/core/input/GestureManager.cpp
diff --git a/third_party/WebKit/Source/core/input/GestureManager.cpp b/third_party/WebKit/Source/core/input/GestureManager.cpp
index 530aa2361e6114eccbf1c958911a20146224372f..657ab21231a7a9314ffbc9fe81297272ae56de4f 100644
--- a/third_party/WebKit/Source/core/input/GestureManager.cpp
+++ b/third_party/WebKit/Source/core/input/GestureManager.cpp
@@ -35,7 +35,7 @@ GestureManager::GestureManager(LocalFrame& frame,
 void GestureManager::clear() {
   m_suppressMouseEventsFromGestures = false;
   m_longTapShouldInvokeContextMenu = false;
-  m_lastShowPressTimestamp = 0;
+  m_lastShowPressTimestamp = TimeTicks();
 }
 
 DEFINE_TRACE(GestureManager) {
@@ -372,14 +372,14 @@ WebInputEventResult GestureManager::sendContextMenuEventForGesture(
       WebPointerProperties::Button::Right, eventType, /* clickCount */ 1,
       static_cast<PlatformEvent::Modifiers>(
           modifiers | PlatformEvent::Modifiers::RightButtonDown),
-      PlatformMouseEvent::FromTouch, WTF::monotonicallyIncreasingTime(),
+      PlatformMouseEvent::FromTouch, TimeTicks::Now(),
       WebPointerProperties::PointerType::Mouse);
 
   return m_frame->eventHandler().sendContextMenuEvent(mouseEvent);
 }
 
 WebInputEventResult GestureManager::handleGestureShowPress() {
-  m_lastShowPressTimestamp = WTF::monotonicallyIncreasingTime();
+  m_lastShowPressTimestamp = TimeTicks::Now();
 
   FrameView* view = m_frame->view();
   if (!view)
@@ -404,7 +404,7 @@ FrameHost* GestureManager::frameHost() const {
   return &m_frame->page()->frameHost();
 }
 
-double GestureManager::getLastShowPressTimestamp() const {
+TimeTicks GestureManager::getLastShowPressTimestamp() const {
   return m_lastShowPressTimestamp;
 }