gfx: Make conversions from Size to SizeF be explicit.

cc/layers/layer.cc

 // Copyright 2010 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/layers/layer.h"
 
 #include <algorithm>
 
 #include "base/atomic_sequence_num.h"
 #include "base/location.h"
@@ skipping 339 matching lines @@
   if (bounds() == size)
     return;
   bounds_ = size;
 
   if (!layer_tree_host_)
     return;
 
   if (ClipNode* clip_node = layer_tree_host_->property_trees()->clip_tree.Node(
           clip_tree_index())) {
     if (clip_node->owner_id == id()) {
-      clip_node->data.clip.set_size(size);
+      clip_node->data.clip.set_size(gfx::SizeF(size));
       layer_tree_host_->property_trees()->clip_tree.set_needs_update(true);
     }
   }
 
   SetNeedsCommitNoRebuild();
 }
 
 Layer* Layer::RootLayer() {
   Layer* layer = this;
   while (layer->parent())
@@ skipping 1314 matching lines @@
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 gfx::Transform Layer::screen_space_transform() const {
   DCHECK_NE(transform_tree_index_, -1);
   return ScreenSpaceTransformFromPropertyTrees(
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 }  // namespace cc