gfx: Make conversions from gfx::Point to PointF explicit.

ui/events/event_unittest.cc

Index: ui/events/event_unittest.cc
diff --git a/ui/events/event_unittest.cc b/ui/events/event_unittest.cc
index 0ebbce10df75c8068014a95206962ee9673866a8..1c03c7ba7c620df207627c72d95bca5d659288d1 100644
--- a/ui/events/event_unittest.cc
+++ b/ui/events/event_unittest.cc
@@ -642,8 +642,8 @@ TEST(EventTest, PointerEventDetailsTouch) {
 }
 
 TEST(EventTest, PointerEventDetailsMouse) {
-  ui::MouseEvent mouse_event(ET_MOUSE_PRESSED, gfx::PointF(0, 0),
-                             gfx::PointF(0, 0), ui::EventTimeForNow(), 0, 0);
+  ui::MouseEvent mouse_event(ET_MOUSE_PRESSED, gfx::Point(0, 0),
+                             gfx::Point(0, 0), ui::EventTimeForNow(), 0, 0);
 
   EXPECT_EQ(EventPointerType::POINTER_TYPE_MOUSE,
             mouse_event.pointer_details().pointer_type());
@@ -664,8 +664,8 @@ TEST(EventTest, PointerEventDetailsMouse) {
 }
 
 TEST(EventTest, PointerEventDetailsStylus) {
-  ui::MouseEvent stylus_event(ET_MOUSE_PRESSED, gfx::PointF(0, 0),
-                              gfx::PointF(0, 0), ui::EventTimeForNow(), 0, 0);
+  ui::MouseEvent stylus_event(ET_MOUSE_PRESSED, gfx::Point(0, 0),
+                              gfx::Point(0, 0), ui::EventTimeForNow(), 0, 0);
   ui::PointerDetails pointer_details(EventPointerType::POINTER_TYPE_PEN,
       /* radius_x */ 0.0f,
       /* radius_y */ 0.0f,