Do not convert from RectF to Rect by flooring.

ui/gfx/rect.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/gfx/rect.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #elif defined(TOOLKIT_GTK)
 #include <gdk/gdk.h>
 #endif
 
 #include "base/logging.h"
 #include "base/stringprintf.h"
 #include "ui/gfx/insets.h"
 #include "ui/gfx/rect_base_impl.h"
+#include "ui/gfx/rect_conversions.h"
 
 namespace gfx {
 
 template class RectBase<Rect, Point, Size, Insets, int>;
 
 typedef class RectBase<Rect, Point, Size, Insets, int> RectBaseT;
 
 Rect::Rect() : RectBaseT(gfx::Point()) {
 }
 
@@ skipping 72 matching lines @@
 CGRect Rect::ToCGRect() const {
   return CGRectMake(x(), y(), width(), height());
 }
 #elif defined(TOOLKIT_GTK)
 GdkRectangle Rect::ToGdkRectangle() const {
   GdkRectangle r = {x(), y(), width(), height()};
   return r;
 }
 #endif
 
+Rect ToRect(const RectF& rect) {
+  return Rect(rect.origin().ToPoint(), rect.size().ToSize());
+}
+
+Rect Rect::ScaleUnsafe(float scale) const {
+  return ToRect(Scale(scale));
+}
+
+Rect Rect::ScaleUnsafe(float x_scale, float y_scale) const {
+  return ToRect(Scale(x_scale, y_scale));
+}
+
 std::string Rect::ToString() const {
   return base::StringPrintf("%s %s",
                             origin().ToString().c_str(),
                             size().ToString().c_str());
 }
 
 }  // namespace gfx