aura: Stop converting Rect to RectF implicitly.

ui/wm/core/image_grid.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 "ui/wm/core/image_grid.h"
 
 #include <algorithm>
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkXfermode.h"
@@ skipping 42 matching lines @@
 // Returns true if |layer|'s bounds don't fit within |size|.
 bool LayerExceedsSize(const ui::Layer* layer, const gfx::Size& size) {
   return layer->bounds().width() > size.width() ||
          layer->bounds().height() > size.height();
 }
 
 }  // namespace
 
 gfx::RectF ImageGrid::TestAPI::GetTransformedLayerBounds(
     const ui::Layer& layer) {
-  gfx::RectF bounds = layer.bounds();
+  gfx::RectF bounds = gfx::RectF(layer.bounds());
   layer.transform().TransformRect(&bounds);
   return bounds;
 }
 
 ImageGrid::ImageGrid()
     : layer_(new ui::Layer(ui::LAYER_NOT_DRAWN)),
       top_image_height_(0),
       bottom_image_height_(0),
       left_image_width_(0),
       right_image_width_(0),
@@ skipping 262 matching lines @@
   layer_ptr->get()->SetBounds(gfx::Rect(0, 0, size.width(), size.height()));
 
   painter_ptr->reset(new ImagePainter(image_skia));
   layer_ptr->get()->set_delegate(painter_ptr->get());
   layer_ptr->get()->SetFillsBoundsOpaquely(false);
   layer_ptr->get()->SetVisible(true);
   layer_->Add(layer_ptr->get());
 }
 
 }  // namespace wm