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

ui/views/controls/button/custom_button_unittest.cc

Index: ui/views/controls/button/custom_button_unittest.cc
diff --git a/ui/views/controls/button/custom_button_unittest.cc b/ui/views/controls/button/custom_button_unittest.cc
index de3be98fe5541c63730f7c00a7ab67cf52cfcee3..caa5e32289550297faba9b47b890705a45c3d28d 100644
--- a/ui/views/controls/button/custom_button_unittest.cc
+++ b/ui/views/controls/button/custom_button_unittest.cc
@@ -96,7 +96,7 @@ class CustomButtonTest : public ViewsTestBase {
 
 // Tests that hover state changes correctly when visiblity/enableness changes.
 TEST_F(CustomButtonTest, HoverStateOnVisibilityChange) {
-  gfx::Point center(10, 10);
+  gfx::PointF center(10.f, 10.f);
   button()->OnMousePressed(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, center, center, ui::EventTimeForNow(),
       ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
@@ -145,7 +145,7 @@ TEST_F(CustomButtonTest, HoverStateOnVisibilityChange) {
 
 // Tests the different types of NotifyActions.
 TEST_F(CustomButtonTest, NotifyAction) {
-  gfx::Point center(10, 10);
+  gfx::PointF center(10.f, 10.f);
 
   // By default the button should notify its listener on mouse release.
   button()->OnMousePressed(ui::MouseEvent(