Add Double{Size, Point, Rect} pretty printers for logging and testing

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

 // Copyright 2014 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/DoublePoint.h"
 #include "platform/geometry/FloatSize.h"
 #include "platform/geometry/LayoutPoint.h"
-
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 DoublePoint::DoublePoint(const LayoutPoint& p)
     : m_x(p.x().toDouble())
     , m_y(p.y().toDouble())
 {
 }
 
 DoublePoint::DoublePoint(const FloatSize& size)
     : m_x(size.width()), m_y(size.height())
 {
 }
 
-#ifndef NDEBUG
 String DoublePoint::toString() const
 {
-    return String::format("%f,%f", x(), y());
+    return String::format("%lg,%lg", x(), y());
 }
-#endif
 
 } // namespace blink