Provide gtest printers for ui/gfx geometry types

ui/gfx/geometry/point.h

Index: ui/gfx/geometry/point.h
diff --git a/ui/gfx/geometry/point.h b/ui/gfx/geometry/point.h
index ff99d71d3610b03f455c8cfd5b1e3d26fdae2463..aea9dbd15af5976c94ac1c3a432e3faf7b258911 100644
--- a/ui/gfx/geometry/point.h
+++ b/ui/gfx/geometry/point.h
@@ -5,6 +5,9 @@
 #ifndef UI_GFX_GEOMETRY_POINT_H_
 #define UI_GFX_GEOMETRY_POINT_H_
 
+#include <iosfwd>
+#include <string>
+
 #include "ui/gfx/geometry/point_base.h"
 #include "ui/gfx/geometry/point_f.h"
 #include "ui/gfx/geometry/vector2d.h"
@@ -85,6 +88,11 @@ inline Point PointAtOffsetFromOrigin(const Vector2d& offset_from_origin) {
 extern template class PointBase<Point, int, Vector2d>;
 #endif
 
+// This is declared here for use in gtest-based unit tests but is defined in
+// the gfx_test_support target. Depend on that to use this in your unit test.
+// This should not be used in production code - call ToString() instead.
+void PrintTo(const Point& point, ::std::ostream* os);
+
 }  // namespace gfx
 
 #endif  // UI_GFX_GEOMETRY_POINT_H_