Implicit coversion operators from integer geometry types to floating point.

ui/gfx/size.h

Index: ui/gfx/size.h
diff --git a/ui/gfx/size.h b/ui/gfx/size.h
index a2cdf3eb4314257a0b0d03469738053214fe4195..4425207a18fa4b25b3a8bb433a4bd7b9da9940a8 100644
--- a/ui/gfx/size.h
+++ b/ui/gfx/size.h
@@ -43,7 +43,7 @@ class UI_EXPORT Size : public SizeBase<Size, int> {
   CGSize ToCGSize() const;
 #endif
 
-  SizeF ToSizeF() const {
+  operator SizeF() const {
     return SizeF(width(), height());
   }
 
@@ -58,6 +58,14 @@ class UI_EXPORT Size : public SizeBase<Size, int> {
   std::string ToString() const;
 };
 
+inline bool operator==(const Size& lhs, const Size& rhs) {
+  return lhs.width() == rhs.width() && lhs.height() == rhs.height();
+}
+
+inline bool operator!=(const Size& lhs, const Size& rhs) {
+  return !(lhs == rhs);
+}
+
 #if !defined(COMPILER_MSVC)
 extern template class SizeBase<Size, int>;
 #endif