gfx: Make conversions from Size to SizeF be explicit.

ui/gfx/geometry/size.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/geometry/size.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #elif defined(OS_IOS)
 #include <CoreGraphics/CoreGraphics.h>
 #elif defined(OS_MACOSX)
 #include <ApplicationServices/ApplicationServices.h>
 #endif
 
 #include "base/strings/stringprintf.h"
+#include "ui/gfx/geometry/size_conversions.h"
 
 namespace gfx {
 
 #if defined(OS_MACOSX)
 Size::Size(const CGSize& s)
     : width_(s.width < 0 ? 0 : s.width),
       height_(s.height < 0 ? 0 : s.height) {
 }
 
 Size& Size::operator=(const CGSize& s) {
@@ skipping 31 matching lines @@
 
 void Size::SetToMax(const Size& other) {
   width_ = width() >= other.width() ? width() : other.width();
   height_ = height() >= other.height() ? height() : other.height();
 }
 
 std::string Size::ToString() const {
   return base::StringPrintf("%dx%d", width(), height());
 }
 
+Size ScaleToCeiledSize(const Size& size, float x_scale, float y_scale) {
+  if (x_scale == 1.f && y_scale == 1.f)
+    return size;
+  return ToCeiledSize(ScaleSize(gfx::SizeF(size), x_scale, y_scale));
+}
+
+Size ScaleToCeiledSize(const Size& size, float scale) {
+  if (scale == 1.f)
+    return size;
+  return ToCeiledSize(ScaleSize(gfx::SizeF(size), scale, scale));
+}
+
+Size ScaleToFlooredSize(const Size& size, float x_scale, float y_scale) {
+  if (x_scale == 1.f && y_scale == 1.f)
+    return size;
+  return ToFlooredSize(ScaleSize(gfx::SizeF(size), x_scale, y_scale));
+}
+
+Size ScaleToFlooredSize(const Size& size, float scale) {
+  if (scale == 1.f)
+    return size;
+  return ToFlooredSize(ScaleSize(gfx::SizeF(size), scale, scale));
+}
+
+Size ScaleToRoundedSize(const Size& size, float x_scale, float y_scale) {
+  if (x_scale == 1.f && y_scale == 1.f)
+    return size;
+  return ToRoundedSize(ScaleSize(gfx::SizeF(size), x_scale, y_scale));
+}
+
+Size ScaleToRoundedSize(const Size& size, float scale) {
+  if (scale == 1.f)
+    return size;
+  return ToRoundedSize(ScaleSize(gfx::SizeF(size), scale, scale));
+}
+
 }  // namespace gfx