Add platform/geometry pretty printers for logging and testing

third_party/WebKit/Source/platform/LayoutUnit.h

 /*
  * Copyright (c) 2012, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 790 matching lines @@
 {
     if (value >= max)
         return max;
     if (value <= min)
         return min;
     return value;
 }
 
 inline std::ostream& operator<<(std::ostream& stream, const LayoutUnit& value)
 {
+    if (value == LayoutUnit::max())
+        return stream << "LayoutUnit::max(" << value.toDouble() << ")";
+    if (value == LayoutUnit::min())
+        return stream << "LayoutUnit::min(" << value.toDouble() << ")";
+    if (value == LayoutUnit::nearlyMax())
+        return stream << "LayoutUnit::nearlyMax(" << value.toDouble() << ")";
+    if (value == LayoutUnit::nearlyMin())
+        return stream << "LayoutUnit::nearlyMin(" << value.toDouble() << ")";
     return stream << value.toDouble();
 }
 
 } // namespace blink
 
 #endif // LayoutUnit_h