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

ash/wm/window_animations.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 "ash/wm/window_animations.h"
 
 #include <math.h>
 
 #include <algorithm>
 #include <vector>
@@ skipping 94 matching lines @@
 
   float scale_x = static_cast<float>(target_bounds.width()) / bounds.width();
   float scale_y = static_cast<float>(target_bounds.height()) / bounds.height();
 
   scoped_ptr<ui::InterpolatedTransform> scale(
       new ui::InterpolatedScale(gfx::Point3F(1, 1, 1),
                                 gfx::Point3F(scale_x, scale_y, 1)));
 
   scoped_ptr<ui::InterpolatedTransform> translation(
       new ui::InterpolatedTranslation(
-          gfx::Point(),
-          gfx::Point(target_bounds.x() - bounds.x(),
-                     target_bounds.y() - bounds.y())));
+          gfx::PointF(), gfx::PointF(target_bounds.x() - bounds.x(),
+                                     target_bounds.y() - bounds.y())));
 
   scale->SetChild(translation.release());
   scale->SetReversed(show);
 
   base::TimeDelta duration = window->layer()->GetAnimator()->
       GetTransitionDuration();
 
   scoped_ptr<ui::LayerAnimationElement> transition(
       ui::LayerAnimationElement::CreateInterpolatedTransformElement(
           scale.release(), duration));
@@ skipping 376 matching lines @@
     case SHELF_ALIGNMENT_LEFT:
       return gfx::Rect(work_area.x(), work_area.y(), 0, 0);
     case SHELF_ALIGNMENT_RIGHT:
       return gfx::Rect(work_area.right(), work_area.y(), 0, 0);
   }
   NOTREACHED();
   return gfx::Rect();
 }
 
 }  // namespace ash