Remove some implicit Point to PointF conversions, add helpers.

ui/gfx/geometry/point.h

 // 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.
 
 #ifndef UI_GFX_GEOMETRY_POINT_H_
 #define UI_GFX_GEOMETRY_POINT_H_
 
 #include <iosfwd>
 #include <string>
 
@@ skipping 114 matching lines @@
 
 inline Point PointAtOffsetFromOrigin(const Vector2d& offset_from_origin) {
   return Point(offset_from_origin.x(), offset_from_origin.y());
 }
 
 // This is declared here for use in gtest-based unit tests but is defined in
 // the gfx_test_support target. Depend on that to use this in your unit test.
 // This should not be used in production code - call ToString() instead.
 void PrintTo(const Point& point, ::std::ostream* os);
 
+// Helper methods to scale a gfx::Point to a new gfx::Point.
+GFX_EXPORT Point ScaleToCeiledPoint(const Point& point,
+                                    float x_scale,
+                                    float y_scale);
+GFX_EXPORT Point ScaleToCeiledPoint(const Point& point, float x_scale);
+GFX_EXPORT Point ScaleToFlooredPoint(const Point& point,
+                                     float x_scale,
+                                     float y_scale);
+GFX_EXPORT Point ScaleToFlooredPoint(const Point& point, float x_scale);
+GFX_EXPORT Point ScaleToRoundedPoint(const Point& point,
+                                     float x_scale,
+                                     float y_scale);
+GFX_EXPORT Point ScaleToRoundedPoint(const Point& point, float x_scale);
+
 }  // namespace gfx
 
 #endif  // UI_GFX_GEOMETRY_POINT_H_