Add platform/geometry pretty printers for logging and testing

third_party/WebKit/Source/platform/geometry/FloatBox.cpp

+// Copyright 2016 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.
+
+#include "platform/geometry/FloatBox.h"
+
+#include <ostream> // NOLINT
+
+namespace blink {
+
+std::ostream& operator<<(std::ostream& os, const FloatBox& box)
+{
+    os << "FloatBox("
+        << "x=" << box.x() << ", "
+        << "y=" << box.y() << ", "
+        << "z=" << box.z() << ", "
+        << "width=" << box.width() << ", "
+        << "height=" << box.height() << ", "
+        << "depth=" << box.depth() << ")";
+    return os;
+}
+
+} // namespace blink