Add platform/geometry pretty printers for logging and testing

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

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2013 Xidorn Quan (quanxunzhen@gmail.com)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "platform/geometry/FloatQuad.h"
 
 #include "third_party/skia/include/core/SkPoint.h"
 #include <algorithm>
 #include <cmath>
 #include <limits>
-
-#ifndef NDEBUG
-#include <stdio.h>
-#endif
+#include <ostream> // NOLINT
 
 namespace blink {
 
 static inline float min4(float a, float b, float c, float d)
 {
     return std::min(std::min(a, b), std::min(c, d));
 }
 
 static inline float max4(float a, float b, float c, float d)
 {
@@ skipping 194 matching lines @@
     return transformedQuad.intersectsCircle(originPoint, radii.height() * radii.width());
 
 }
 
 bool FloatQuad::isCounterclockwise() const
 {
     // Return if the two first vectors are turning clockwise. If the quad is convex then all following vectors will turn the same way.
     return determinant(m_p2 - m_p1, m_p3 - m_p2) < 0;
 }
 
-#ifndef NDEBUG
-void FloatQuad::show() const
+std::ostream& operator<<(std::ostream& os, const FloatQuad& quad)
 {
-    fprintf(stderr, "FloatQuad: [p1=(%f,%f), p2=(%f,%f), p3=(%f,%f), p4=(%f,%f))]\n", m_p1.x(), m_p1.y(), m_p2.x(), m_p2.y(), m_p3.x(), m_p3.y(), m_p4.x(), m_p4.y());
+    os << "FloatQuad("
+        << "p1=(" << quad.p1().x() << ", " << quad.p1().y() << "), "
+        << "p2=(" << quad.p2().x() << ", " << quad.p2().y() << "), "
+        << "p3=(" << quad.p3().x() << ", " << quad.p3().y() << "), "
+        << "p4=(" << quad.p4().x() << ", " << quad.p4().y() << "))";
+    return os;
 }
-#endif
 
 } // namespace blink