change the DRT to use Light theme

    <application android:name="HTMLHostApp">

        <uses-library android:name="android.test.runner" />

        <activity android:name="Menu" android:label="Dump Render Tree"

          android:screenOrientation="portrait">

          android:screenOrientation="portrait"

          android:theme="@android:style/Theme.Light">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.TEST" />

            </intent-filter>

        </activity>

        <activity android:name="TestShellActivity" android:launchMode="singleTop"

          android:screenOrientation="portrait"/>

        <activity android:name="ReliabilityTestActivity" android:screenOrientation="portrait"/>

          android:screenOrientation="portrait"

          android:theme="@android:style/Theme.Light"/>

        <activity android:name="ReliabilityTestActivity" android:screenOrientation="portrait"

          android:theme="@android:style/Theme.Light"/>

    </application>

    <instrumentation android:name=".LayoutTestsAutoRunner"