The dependency org.jboss.arquillian.extension:arquillian-drone-webdriver-depchain:pom
is not needed.
It should be enough to use dependencies listed in the tutorial.
You can upgrade version though, to:
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.jboss.arquillian</groupId>
<artifactId>arquillian-bom</artifactId>
<version>1.1.3.Final</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.extension</groupId>
<artifactId>arquillian-drone-bom</artifactId>
<version>1.2.3.Final</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.selenium</groupId>
<artifactId>selenium-bom</artifactId>
<version>2.39.0</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
and
<dependency>
<groupId>org.jboss.arquillian.graphene</groupId>
<artifactId>graphene-webdriver</artifactId>
<version>2.0.1.Final</version>
<type>pom</type>
<scope>test</scope>
</dependency>