Use Length for the stroke-width property in SVGLayoutStyle

Source/core/layout/style/SVGLayoutStyleTest.cpp

Index: Source/core/layout/style/SVGLayoutStyleTest.cpp
diff --git a/Source/core/layout/style/SVGLayoutStyleTest.cpp b/Source/core/layout/style/SVGLayoutStyleTest.cpp
index c4709a47a683f6278c0a51506ab57a9f0e73979c..7f0c90f5ca47c40ee497a1356917d89afd9d6397 100644
--- a/Source/core/layout/style/SVGLayoutStyleTest.cpp
+++ b/Source/core/layout/style/SVGLayoutStyleTest.cpp
@@ -5,26 +5,12 @@
 #include "config.h"
 #include "core/layout/style/SVGLayoutStyle.h"
 
-#include "core/svg/SVGLength.h"
-
 #include <gtest/gtest.h>
 
 using namespace blink;
 
 namespace {
 
-// Ensures RefPtrWillBePersistent values are compared by their values, not by pointers.
-#define TEST_STYLE_REFPTRWILLBEPERSISTENT_VALUE_NO_DIFF(type, fieldName) \
-    { \
-        RefPtr<SVGLayoutStyle> svg1 = SVGLayoutStyle::create(); \
-        RefPtr<SVGLayoutStyle> svg2 = SVGLayoutStyle::create(); \
-        RefPtrWillBePersistent<type> value1 = type::create(); \
-        RefPtrWillBePersistent<type> value2 = value1->clone(); \
-        svg1->set##fieldName(value1); \
-        svg2->set##fieldName(value2); \
-        EXPECT_FALSE(svg1->diff(svg2.get()).hasDifference()); \
-    }
-
 // Ensures RefPtr values are compared by their values, not by pointers.
 #define TEST_STYLE_REFPTR_VALUE_NO_DIFF(type, fieldName) \
     { \
@@ -53,7 +39,7 @@ TEST(SVGLayoutStyleTest, StrokeStyleShouldCompareValue)
 {
     TEST_STYLE_VALUE_NO_DIFF(float, StrokeOpacity);
     TEST_STYLE_VALUE_NO_DIFF(float, StrokeMiterLimit);
-    TEST_STYLE_REFPTRWILLBEPERSISTENT_VALUE_NO_DIFF(SVGLength, StrokeWidth);
+    TEST_STYLE_VALUE_NO_DIFF(UnzoomedLength, StrokeWidth);
     TEST_STYLE_VALUE_NO_DIFF(Length, StrokeDashOffset);
     TEST_STYLE_REFPTR_VALUE_NO_DIFF(SVGDashArray, StrokeDashArray);