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

ash/wm/workspace_controller_unittest.cc

Index: ash/wm/workspace_controller_unittest.cc
diff --git a/ash/wm/workspace_controller_unittest.cc b/ash/wm/workspace_controller_unittest.cc
index 3739158577a6a31a7d5e5282f277b6136d93cacf..1172762956600eb9c6bc99e6e3656477d713825b 100644
--- a/ash/wm/workspace_controller_unittest.cc
+++ b/ash/wm/workspace_controller_unittest.cc
@@ -1477,7 +1477,7 @@ TEST_F(WorkspaceControllerTest, WindowEdgeHitTest) {
     aura::Window* expected_target = times == 0 ? second.get() : first.get();
     for (int i = 0; i < kNumPoints; ++i) {
       SCOPED_TRACE(points[i].direction);
-      const gfx::Point& location = points[i].location;
+      auto location = gfx::PointF(points[i].location);
       ui::MouseEvent mouse(ui::ET_MOUSE_MOVED, location, location,
                            ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE);
       ui::EventTarget* target = targeter->FindTargetForEvent(root, &mouse);
@@ -1518,7 +1518,7 @@ TEST_F(WorkspaceControllerTest, WindowEdgeMouseHitTestPanel) {
   };
   for (int i = 0; i < kNumPoints; ++i) {
     SCOPED_TRACE(points[i].direction);
-    const gfx::Point& location = points[i].location;
+    auto location = gfx::PointF(points[i].location);
     ui::MouseEvent mouse(ui::ET_MOUSE_MOVED, location, location,
                          ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE);
     ui::EventTarget* target = targeter->FindTargetForEvent(root, &mouse);
@@ -1554,7 +1554,7 @@ TEST_F(WorkspaceControllerTest, WindowEdgeTouchHitTestPanel) {
   };
   for (int i = 0; i < kNumPoints; ++i) {
     SCOPED_TRACE(points[i].direction);
-    const gfx::Point& location = points[i].location;
+    auto location = gfx::PointF(points[i].location);
     ui::TouchEvent touch(ui::ET_TOUCH_PRESSED, location, 0,
                          ui::EventTimeForNow());
     ui::EventTarget* target = targeter->FindTargetForEvent(root, &touch);
@@ -1595,7 +1595,7 @@ TEST_F(WorkspaceControllerTest, WindowEdgeHitTestDocked) {
   };
   for (int i = 0; i < kNumPoints; ++i) {
     SCOPED_TRACE(points[i].direction);
-    const gfx::Point& location = points[i].location;
+    auto location = gfx::PointF(points[i].location);
     ui::MouseEvent mouse(ui::ET_MOUSE_MOVED, location, location,
                          ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE);
     ui::EventTarget* target = targeter->FindTargetForEvent(root, &mouse);