Add platform/transforms pretty printers for logging and testing

third_party/WebKit/Source/platform/transforms/TransformationMatrix.h

 /*
  * Copyright (C) 2005, 2006 Apple Computer, 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 376 matching lines @@
 
     // If this transformation is identity or 2D translation, returns the
     // translation.
     FloatSize to2DTranslation() const;
 
     typedef float FloatMatrix4[16];
     void toColumnMajorFloatArray(FloatMatrix4& result) const;
 
     static SkMatrix44 toSkMatrix44(const TransformationMatrix&);
 
+    // If |asMatrix|, return the matrix in row-major order. Otherwise, return
+    // the transform's decomposition which shows the translation, scale, etc.
+    String toString(bool asMatrix = false) const;
+
 private:
     // multiply passed 2D point by matrix (assume z=0)
     void multVecMatrix(double x, double y, double& dstX, double& dstY) const;
     FloatPoint internalMapPoint(const FloatPoint& sourcePoint) const
     {
         double resultX;
         double resultY;
         multVecMatrix(sourcePoint.x(), sourcePoint.y(), resultX, resultY);
         return FloatPoint(static_cast<float>(resultX), static_cast<float>(resultY));
     }
@@ skipping 27 matching lines @@
     Matrix4 m_matrix;
 };
 
 // Redeclared here to avoid ODR issues.
 // See platform/testing/TransformPrinters.h.
 void PrintTo(const TransformationMatrix&, std::ostream*);
 
 } // namespace blink
 
 #endif // TransformationMatrix_h