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

cc/tiles/picture_layer_tiling.cc

 // Copyright 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 "cc/tiles/picture_layer_tiling.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <set>
@@ skipping 513 matching lines @@
   }
 
   return *this;
 }
 
 gfx::Rect PictureLayerTiling::CoverageIterator::geometry_rect() const {
   return current_geometry_rect_;
 }
 
 gfx::RectF PictureLayerTiling::CoverageIterator::texture_rect() const {
-  gfx::PointF tex_origin =
-      tiling_->tiling_data_.TileBoundsWithBorder(tile_i_, tile_j_).origin();
+  auto tex_origin = gfx::PointF(
+      tiling_->tiling_data_.TileBoundsWithBorder(tile_i_, tile_j_).origin());
 
   // Convert from dest space => content space => texture space.
   gfx::RectF texture_rect(current_geometry_rect_);
   texture_rect.Scale(dest_to_content_scale_,
                      dest_to_content_scale_);
   texture_rect.Intersect(gfx::RectF(gfx::SizeF(tiling_->tiling_size())));
   if (texture_rect.IsEmpty())
     return texture_rect;
   texture_rect.Offset(-tex_origin.OffsetFromOrigin());
 
@@ skipping 459 matching lines @@
 size_t PictureLayerTiling::GPUMemoryUsageInBytes() const {
   size_t amount = 0;
   for (TileMap::const_iterator it = tiles_.begin(); it != tiles_.end(); ++it) {
     const Tile* tile = it->second;
     amount += tile->GPUMemoryUsageInBytes();
   }
   return amount;
 }
 
 }  // namespace cc