Implicit coversion operators from integer geometry types to floating point.

ui/gfx/size_f.h

Index: ui/gfx/size_f.h
diff --git a/ui/gfx/size_f.h b/ui/gfx/size_f.h
index f3ad7dbed9904aebb1aa9a1b52bba16623ef19ad..f9ac6bd890e5b5ab7ec4e7d4c880a5c7f4fef84b 100644
--- a/ui/gfx/size_f.h
+++ b/ui/gfx/size_f.h
@@ -30,6 +30,14 @@ class UI_EXPORT SizeF : public SizeBase<SizeF, float> {
   std::string ToString() const;
 };
 
+inline bool operator==(const SizeF& lhs, const SizeF& rhs) {
+  return lhs.width() == rhs.width() && lhs.height() == rhs.height();
+}
+
+inline bool operator!=(const SizeF& lhs, const SizeF& rhs) {
+  return !(lhs == rhs);
+}
+
 #if !defined(COMPILER_MSVC)
 extern template class SizeBase<SizeF, float>;
 #endif