Split out String, URI and CustomIdent from CSSPrimitiveValue

Source/core/css/CSSValue.cpp

Index: Source/core/css/CSSValue.cpp
diff --git a/Source/core/css/CSSValue.cpp b/Source/core/css/CSSValue.cpp
index d2c3068f33667a4cda71329837fd4dfdef05e8af..bef285d02b12eb425ec2cd3762e875ebd335c975 100644
--- a/Source/core/css/CSSValue.cpp
+++ b/Source/core/css/CSSValue.cpp
@@ -50,6 +50,7 @@
 #include "core/css/CSSReflectValue.h"
 #include "core/css/CSSSVGDocumentValue.h"
 #include "core/css/CSSShadowValue.h"
+#include "core/css/CSSStringValue.h"
 #include "core/css/CSSTimingFunctionValue.h"
 #include "core/css/CSSUnicodeRangeValue.h"
 #include "core/css/CSSUnsetValue.h"
@@ -137,6 +138,8 @@ bool CSSValue::equals(const CSSValue& other) const
             return compareCSSValues<CSSReflectValue>(*this, other);
         case ShadowClass:
             return compareCSSValues<CSSShadowValue>(*this, other);
+        case StringClass:
+            return compareCSSValues<CSSStringValue>(*this, other);
         case CubicBezierTimingFunctionClass:
             return compareCSSValues<CSSCubicBezierTimingFunctionValue>(*this, other);
         case StepsTimingFunctionClass:
@@ -207,6 +210,8 @@ String CSSValue::cssText() const
         return toCSSReflectValue(this)->customCSSText();
     case ShadowClass:
         return toCSSShadowValue(this)->customCSSText();
+    case StringClass:
+        return toCSSStringValue(this)->customCSSText();
     case CubicBezierTimingFunctionClass:
         return toCSSCubicBezierTimingFunctionValue(this)->customCSSText();
     case StepsTimingFunctionClass:
@@ -296,6 +301,9 @@ void CSSValue::destroy()
     case ShadowClass:
         delete toCSSShadowValue(this);
         return;
+    case StringClass:
+        delete toCSSStringValue(this);
+        return;
     case CubicBezierTimingFunctionClass:
         delete toCSSCubicBezierTimingFunctionValue(this);
         return;
@@ -393,6 +401,9 @@ void CSSValue::finalizeGarbageCollectedObject()
     case ShadowClass:
         toCSSShadowValue(this)->~CSSShadowValue();
         return;
+    case StringClass:
+        toCSSStringValue(this)->~CSSStringValue();
+        return;
     case CubicBezierTimingFunctionClass:
         toCSSCubicBezierTimingFunctionValue(this)->~CSSCubicBezierTimingFunctionValue();
         return;
@@ -490,6 +501,9 @@ DEFINE_TRACE(CSSValue)
     case ShadowClass:
         toCSSShadowValue(this)->traceAfterDispatch(visitor);
         return;
+    case StringClass:
+        toCSSStringValue(this)->traceAfterDispatch(visitor);
+        return;
     case CubicBezierTimingFunctionClass:
         toCSSCubicBezierTimingFunctionValue(this)->traceAfterDispatch(visitor);
         return;