gfx: Make conversions from Size to SizeF be explicit.

ui/gfx/geometry/size.cc

Index: ui/gfx/geometry/size.cc
diff --git a/ui/gfx/geometry/size.cc b/ui/gfx/geometry/size.cc
index 03aa69660190df7f7eb10b65cdf625bd1c7df8e6..86e1aeb9b174f90345880a02af21d694acb1ecc6 100644
--- a/ui/gfx/geometry/size.cc
+++ b/ui/gfx/geometry/size.cc
@@ -13,6 +13,7 @@
 #endif
 
 #include "base/strings/stringprintf.h"
+#include "ui/gfx/geometry/size_conversions.h"
 
 namespace gfx {
 
@@ -64,4 +65,40 @@ 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