Extend the geometry APIs.

mojo/services/geometry/cpp/logging.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MOJO_SERVICES_GEOMETRY_CPP_LOGGING_H_
+#define MOJO_SERVICES_GEOMETRY_CPP_LOGGING_H_
+
+#include "mojo/common/logging.h"

[jamesr, 2015/12/10 23:35:50]

i don't see this header in
https://github.com/domokit/mojo/tree/master/mojo/common - where does it come
from?

[viettrungluu, 2015/12/10 23:54:28]

More relevantly, none of that seems to be needed for this file (or the
corresponding .cc). All that seems to be needed is std::ostream. (This file
should just need <iosfwd>.)

[jeffbrown, 2015/12/11 19:40:55]

ahh, iosfwd is a good idea

+#include "mojo/services/geometry/interfaces/geometry.mojom.h"
+
+namespace mojo {
+
+std::ostream& operator<<(std::ostream& os, const mojo::Point& value);
+std::ostream& operator<<(std::ostream& os, const mojo::Size& value);
+std::ostream& operator<<(std::ostream& os, const mojo::Rect& value);
+std::ostream& operator<<(std::ostream& os, const mojo::RRect& value);
+std::ostream& operator<<(std::ostream& os, const mojo::Transform& value);
+
+}  // namespace mojo
+
+#endif  // MOJO_SERVICES_GEOMETRY_CPP_LOGGING_H_