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

ui/gfx/geometry/point.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/geometry/point.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #elif defined(OS_IOS)
 #include <CoreGraphics/CoreGraphics.h>
 #elif defined(OS_MACOSX)
 #include <ApplicationServices/ApplicationServices.h>
 #endif
 
 #include "base/strings/stringprintf.h"
 #include "ui/gfx/geometry/point_conversions.h"
+#include "ui/gfx/geometry/point_f.h"
 
 namespace gfx {
 
 #if defined(OS_WIN)
 Point::Point(DWORD point) {
   POINTS points = MAKEPOINTS(point);
   x_ = points.x;
   y_ = points.y;
 }
 
@@ skipping 67 matching lines @@
   return ToRoundedPoint(ScalePoint(gfx::PointF(point), x_scale, y_scale));
 }
 
 Point ScaleToRoundedPoint(const Point& point, float scale) {
   if (scale == 1.f)
     return point;
   return ToRoundedPoint(ScalePoint(gfx::PointF(point), scale, scale));
 }
 
 }  // namespace gfx