Stabilize empty rect handling in EnclosingRect.

ui/gfx/geometry/size_f.cc

Index: ui/gfx/geometry/size_f.cc
diff --git a/ui/gfx/geometry/size_f.cc b/ui/gfx/geometry/size_f.cc
index 6d08e18c62ea5b1ad33dee9cecf26e0ff347e47a..a53352bdf719eec8327626e715225b601ec0728a 100644
--- a/ui/gfx/geometry/size_f.cc
+++ b/ui/gfx/geometry/size_f.cc
@@ -17,13 +17,13 @@ void SizeF::Enlarge(float grow_width, float grow_height) {
 }
 
 void SizeF::SetToMin(const SizeF& other) {
-  width_ = width() <= other.width() ? width() : other.width();
-  height_ = height() <= other.height() ? height() : other.height();
+  set_width(width() <= other.width() ? width() : other.width());
+  set_height(height() <= other.height() ? height() : other.height());
 }
 
 void SizeF::SetToMax(const SizeF& other) {
-  width_ = width() >= other.width() ? width() : other.width();
-  height_ = height() >= other.height() ? height() : other.height();
+  set_width(width() >= other.width() ? width() : other.width());
+  set_height(height() >= other.height() ? height() : other.height());
 }
 
 std::string SizeF::ToString() const {