gfx: Make conversions from Size to SizeF be explicit.

cc/trees/layer_tree_host_common.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_host_common.h"
 
 #include <algorithm>
 
 #include "base/trace_event/trace_event.h"
 #include "cc/base/math_util.h"
@@ skipping 253 matching lines @@
 };
 
 static gfx::Rect TranslateRectToTargetSpace(const LayerImpl& ancestor_layer,
                                             const LayerImpl& descendant_layer,
                                             const gfx::Rect& rect,
                                             TranslateRectDirection direction) {
   gfx::Vector2dF translation =
       ComputeChangeOfBasisTranslation(ancestor_layer, descendant_layer);
   if (direction == TRANSLATE_RECT_DIRECTION_TO_DESCENDANT)
     translation.Scale(-1.f);
+  gfx::RectF rect_f = gfx::RectF(rect);
   return gfx::ToEnclosingRect(
-      gfx::RectF(rect.origin() + translation, rect.size()));
+      gfx::RectF(rect_f.origin() + translation, rect_f.size()));
 }
 
 // Attempts to update the clip rects for the given layer. If the layer has a
 // clip_parent, it may not inherit its immediate ancestor's clip.
 static void UpdateClipRectsForClipChild(
     const LayerImpl* layer,
     gfx::Rect* clip_rect_in_parent_target_space,
     bool* subtree_should_be_clipped) {
   // If the layer has no clip_parent, or the ancestor is the same as its actual
   // parent, then we don't need special clip rects. Bail now and leave the out
@@ skipping 2479 matching lines @@
 
 PropertyTrees* GetPropertyTrees(Layer* layer) {
   return layer->layer_tree_host()->property_trees();
 }
 
 PropertyTrees* GetPropertyTrees(LayerImpl* layer) {
   return layer->layer_tree_impl()->property_trees();
 }
 
 }  // namespace cc