Retire FractionalMouseTypePointerEvent flag

Fractional Mouse type pointerEvent shipped in M64
https://chromium-review.googlesource.com/753511
https://www.chromestatus.com/feature/5117956774166528

Remove the flag and clean up related todo.

BUG=773813

Change-Id: Id8e17705b43d3bfe55deeed2a3bf7d39b61a71ed
Reviewed-on: https://chromium-review.googlesource.com/c/1230577Reviewed-by: Mustaq Ahmed <mustaq@chromium.org>
Reviewed-by: David Bokan <bokan@chromium.org>
Commit-Queue: Ella Ge <eirage@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604572}

third_party/blink/renderer/core/events/pointer_event.cc

@@ -63,57 +63,12 @@ bool PointerEvent::IsPointerEvent() const {
   return true;
 }
 
-double PointerEvent::screenX() const {
-  return (!RuntimeEnabledFeatures::FractionalMouseTypePointerEventEnabled() &&
-          pointer_type_ == "mouse")
-             ? static_cast<int>(screen_location_.X())
-             : screen_location_.X();
-}
-
-double PointerEvent::screenY() const {
-  return (!RuntimeEnabledFeatures::FractionalMouseTypePointerEventEnabled() &&
-          pointer_type_ == "mouse")
-             ? static_cast<int>(screen_location_.Y())
-             : screen_location_.Y();
-}
-
-double PointerEvent::clientX() const {
-  return (!RuntimeEnabledFeatures::FractionalMouseTypePointerEventEnabled() &&
-          pointer_type_ == "mouse")
-             ? static_cast<int>(client_location_.X())
-             : client_location_.X();
-}
-
-double PointerEvent::clientY() const {
-  return (!RuntimeEnabledFeatures::FractionalMouseTypePointerEventEnabled() &&
-          pointer_type_ == "mouse")
-             ? static_cast<int>(client_location_.Y())
-             : client_location_.Y();
-}
-
-double PointerEvent::pageX() const {
-  return (!RuntimeEnabledFeatures::FractionalMouseTypePointerEventEnabled() &&
-          pointer_type_ == "mouse")
-             ? static_cast<int>(page_location_.X())
-             : page_location_.X();
-}
-
-double PointerEvent::pageY() const {
-  return (!RuntimeEnabledFeatures::FractionalMouseTypePointerEventEnabled() &&
-          pointer_type_ == "mouse")
-             ? static_cast<int>(page_location_.Y())
-             : page_location_.Y();
-}
-
 double PointerEvent::offsetX() {
   if (!HasPosition())
     return 0;
   if (!has_cached_relative_position_)
     ComputeRelativePosition();
-  return (!RuntimeEnabledFeatures::FractionalMouseTypePointerEventEnabled() &&
-          pointer_type_ == "mouse")
-             ? std::round(offset_location_.X())
-             : offset_location_.X();
+  return offset_location_.X();
 }
 
 double PointerEvent::offsetY() {
@@ -121,10 +76,7 @@ double PointerEvent::offsetY() {
     return 0;
   if (!has_cached_relative_position_)
     ComputeRelativePosition();
-  return (!RuntimeEnabledFeatures::FractionalMouseTypePointerEventEnabled() &&
-          pointer_type_ == "mouse")
-             ? std::round(offset_location_.Y())
-             : offset_location_.Y();
+  return offset_location_.Y();
 }
 
 void PointerEvent::ReceivedTarget() {

third_party/blink/renderer/core/events/pointer_event.h

@@ -39,14 +39,12 @@ class CORE_EXPORT PointerEvent final : public MouseEvent {
   bool IsMouseEvent() const override;
   bool IsPointerEvent() const override;
 
-  // TODO(eirage): Remove these override of coordinates getters when
-  // fractional mouseevent flag is removed.
-  double screenX() const override;
-  double screenY() const override;
-  double clientX() const override;
-  double clientY() const override;
-  double pageX() const override;
-  double pageY() const override;
+  double screenX() const override { return screen_location_.X(); }
+  double screenY() const override { return screen_location_.Y(); }
+  double clientX() const override { return client_location_.X(); }
+  double clientY() const override { return client_location_.Y(); }
+  double pageX() const override { return page_location_.X(); }
+  double pageY() const override { return page_location_.Y(); }
 
   double offsetX() override;
   double offsetY() override;

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -521,10 +521,6 @@
     {
       name: "FractionalMouseEvent",
     },
-    {
-      name: "FractionalMouseTypePointerEvent",
-      status: "stable",
-    },
     {
       name: "FractionalScrollOffsets",
     },