Add platform/geometry pretty printers for logging and testing

third_party/WebKit/Source/platform/geometry/LayoutSize.h

Index: third_party/WebKit/Source/platform/geometry/LayoutSize.h
diff --git a/third_party/WebKit/Source/platform/geometry/LayoutSize.h b/third_party/WebKit/Source/platform/geometry/LayoutSize.h
index 2ed633320a879a9f1c6029fa5267f1033fc97b0d..1c51def6053305c7ec7ca82297a183daab281288 100644
--- a/third_party/WebKit/Source/platform/geometry/LayoutSize.h
+++ b/third_party/WebKit/Source/platform/geometry/LayoutSize.h
@@ -148,9 +148,7 @@ public:
         return LayoutSize(m_width.fraction(), m_height.fraction());
     }
 
-#ifndef NDEBUG
     String toString() const;
-#endif
 
 private:
     LayoutUnit m_width, m_height;
@@ -232,6 +230,10 @@ inline LayoutSize roundedLayoutSize(const FloatSize& s)
     return LayoutSize(s);
 }
 
+// Redeclared here to avoid ODR issues.
+// See platform/testing/GeometryPrinters.h.
+void PrintTo(const LayoutSize&, std::ostream*);
+
 } // namespace blink
 
 #endif // LayoutSize_h