Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/core/inspector/InjectedScript.cpp

Index: Source/core/inspector/InjectedScript.cpp
diff --git a/Source/core/inspector/InjectedScript.cpp b/Source/core/inspector/InjectedScript.cpp
index d746427a680b18d51dd287faa03728cbd1ecbd72..cfe7b56cbf4650f4dc4ad9d54860155f0bc39f52 100644
--- a/Source/core/inspector/InjectedScript.cpp
+++ b/Source/core/inspector/InjectedScript.cpp
@@ -258,7 +258,7 @@ PassRefPtr<TypeBuilder::Runtime::RemoteObject> InjectedScript::wrapObject(const
     bool hadException = false;
     ScriptValue r = callFunctionWithEvalEnabled(wrapFunction, hadException);
     if (hadException)
-        return 0;
+        return nullptr;
     RefPtr<JSONObject> rawResult = r.toJSONValue(scriptState())->asObject();
     return TypeBuilder::Runtime::RemoteObject::runtimeCast(rawResult);
 }
@@ -276,7 +276,7 @@ PassRefPtr<TypeBuilder::Runtime::RemoteObject> InjectedScript::wrapTable(const S
     bool hadException = false;
     ScriptValue r = callFunctionWithEvalEnabled(wrapFunction, hadException);
     if (hadException)
-        return 0;
+        return nullptr;
     RefPtr<JSONObject> rawResult = r.toJSONValue(scriptState())->asObject();
     return TypeBuilder::Runtime::RemoteObject::runtimeCast(rawResult);
 }