Add platform/geometry pretty printers for logging and testing

third_party/WebKit/Source/platform/geometry/LayoutPoint.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/LayoutPoint.h"
 
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
-#ifndef NDEBUG
 String LayoutPoint::toString() const
 {
-    return String::format("%f,%f", x().toDouble(), y().toDouble());
+    return String::format("%s,%s",
+        x().toString().ascii().data(),
+        y().toString().ascii().data());
 }
-#endif
 
 } // namespace blink