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

cc/trees/layer_tree_impl.cc

 // Copyright 2011 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 "cc/trees/layer_tree_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 
@@ skipping 1466 matching lines @@
 static ViewportSelectionBound ComputeViewportSelectionBound(
     const LayerSelectionBound& layer_bound,
     LayerImpl* layer,
     float device_scale_factor) {
   ViewportSelectionBound viewport_bound;
   viewport_bound.type = layer_bound.type;
 
   if (!layer || layer_bound.type == SELECTION_BOUND_EMPTY)
     return viewport_bound;
 
-  gfx::PointF layer_top = layer_bound.edge_top;
-  gfx::PointF layer_bottom = layer_bound.edge_bottom;
+  auto layer_top = gfx::PointF(layer_bound.edge_top);
+  auto layer_bottom = gfx::PointF(layer_bound.edge_bottom);
 
   bool clipped = false;
   gfx::PointF screen_top =
       MathUtil::MapPoint(layer->screen_space_transform(), layer_top, &clipped);
   gfx::PointF screen_bottom = MathUtil::MapPoint(
       layer->screen_space_transform(), layer_bottom, &clipped);
 
   // MapPoint can produce points with NaN components (even when no inputs are
   // NaN). Since consumers of ViewportSelectionBounds may round |edge_top| or
   // |edge_bottom| (and since rounding will crash on NaN), we return an empty
@@ skipping 232 matching lines @@
                                                    const gfx::BoxF& box,
                                                    gfx::BoxF* bounds) const {
   *bounds = gfx::BoxF();
   return layer_tree_host_impl_->animation_host()
              ? layer_tree_host_impl_->animation_host()
                    ->TransformAnimationBoundsForBox(layer->id(), box, bounds)
              : true;
 }
 
 }  // namespace cc