[dartium] Dart half of ScriptValue refactoring.

Source/bindings/common/ScriptValue.h

Index: Source/bindings/common/ScriptValue.h
diff --git a/Source/bindings/common/ScriptValue.h b/Source/bindings/common/ScriptValue.h
index a4e178554cf333c6594a82f57b50ce2a524e1bad..eab1c26f9d3edebfc5fcb72893cdd9a211390ed9 100644
--- a/Source/bindings/common/ScriptValue.h
+++ b/Source/bindings/common/ScriptValue.h
@@ -34,6 +34,7 @@
 #include "bindings/common/AbstractScriptValue.h"
 #include "bindings/v8/SharedPersistent.h"
 #include "bindings/v8/V8ScriptValue.h"
+#include "bindings/dart/DartScriptValue.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 #include "wtf/text/WTFString.h"
@@ -90,10 +91,17 @@ public:
         return static_cast<V8ScriptValue*>(m_implScriptValue.get())->isolate();
     }
 
+    // FIXMEMULTIVM: Remove.
     v8::Handle<v8::Value> v8Value() const
     {
-        ASSERT(m_implScriptValue->isV8());
-        return static_cast<V8ScriptValue*>(m_implScriptValue.get())->v8Value();
+        if (m_implScriptValue->isV8()) {
+            return static_cast<V8ScriptValue*>(m_implScriptValue.get())->v8Value();
+        }
+        if (m_implScriptValue->isDart()) {
+            return static_cast<DartScriptValue*>(m_implScriptValue.get())->v8Value();
+        }
+        ASSERT_NOT_REACHED();
+        return v8::Handle<v8::Value>();
     }
 
     ScriptValue& operator=(const ScriptValue& value)
@@ -169,6 +177,11 @@ public:
 
     PassRefPtr<JSONValue> toJSONValue(ScriptState* state) const;
 
+    AbstractScriptValue* scriptValue() const
+    {
+        return m_implScriptValue.get();
+    }
+
 private:
     RefPtr<AbstractScriptValue> m_implScriptValue;
 };