Create PaintChunk and begin writing code to build paint chunks.

third_party/WebKit/Source/platform/testing/PaintPrinters.h

 // Copyright 2015 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.
 
-#ifndef GeometryPrinters_h
-#define GeometryPrinters_h
+#ifndef PaintPrinters_h
+#define PaintPrinters_h
 
-#include "platform/geometry/FloatRoundedRect.h"
 #include <iosfwd>
 
 namespace blink {
 
-class FloatBox;
-class FloatPoint;
-class FloatPoint3D;
-class FloatQuad;
-class FloatRect;
-class FloatSize;
-class LayoutRect;
+struct PaintChunk;
+struct PaintProperties;
 
-// GTest print support for geometry classes.
+// GTest print support for platform paint classes.
 //
 // To avoid ODR violations, these should also be declared in the respective

[chrishtr, 2015/10/05 17:23:41]

ODR?

[jbroman, 2015/10/05 17:25:53]

http://en.cppreference.com/w/cpp/language/definition#One_Definition_Rule

[jbroman, 2015/10/05 18:05:07]

Apparently you meant "what is the ODR violation"? If this is declared in some
tests but not others, some occurrences of EXPECT_EQ and friends will refer to an
instantiation of the GTest templates that calls the custom printer and some will
refer to an instantiation which calls the default printer. This is undefined
behaviour.

 // headers defining these types. This is required because otherwise a template
 // instantiation may be instantiated differently, depending on whether this
 // declaration is found.
 //
 // As a result, it is not necessary to include this file in tests in order to
 // use these printers. If, however, you get a link error about these symbols,
 // you need to make sure the blink_platform_test_support target is linked in
 // your unit test binary.
-void PrintTo(const FloatBox&, std::ostream*);
-void PrintTo(const FloatPoint&, std::ostream*);
-void PrintTo(const FloatPoint3D&, std::ostream*);
-void PrintTo(const FloatQuad&, std::ostream*);
-void PrintTo(const FloatRect&, std::ostream*);
-void PrintTo(const FloatRoundedRect&, std::ostream*);
-void PrintTo(const FloatRoundedRect::Radii&, std::ostream*);
-void PrintTo(const FloatSize&, std::ostream*);
-void PrintTo(const LayoutRect&, std::ostream*);
+void PrintTo(const PaintChunk&, std::ostream*);
+void PrintTo(const PaintProperties&, std::ostream*);
 
 } // namespace blink
 
-#endif // GeometryPrinters_h
+#endif // PaintPrinters_h