Switch from PrintTo to operator<< for platform printers

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 "wtf/text/WTFString.h"
 
 namespace blink {
 
 String FloatBox::toString() const
 {
     return String::format("%lg,%lg,%lg %lgx%lgx%lg", x(), y(), z(), width(), height(), depth());
 }
 
+std::ostream& operator<<(std::ostream& ostream, const FloatBox& box)
+{
+    return ostream << box.toString();
+}
+
 } // namespace blink