Fix for ninja build

build/android/ant/chromium-jars.xml

 <!--
   Copyright (c) 2012 The Chromium Authors. All rights reserved.
   Use of this source code is governed by a BSD-style license that can be
   found in the LICENSE file.
 -->
 <project name="chromium-jars" default="dist">
   <!--
     Common ant build file for for chromium_*.jars.
     For creating a new chromium_*.jar :
     1. Use build/java.gypi action.
     The jar will be created as chromium_${PACKAGE_NAME} in
     ${PRODUCT_DIR}/lib.java.
   -->
   <description>
     Building ${PROJECT_NAME}/ java source code with ant.
   </description>
 
   <import file="common.xml"/>
 
   <path id="javac.custom.classpath">
-    <filelist dir="/" files="${INPUT_JARS_PATHS}"/>
+    <filelist files="${INPUT_JARS_PATHS}"/>
     <pathelement location="${ANDROID_SDK}/android.jar" />
   </path>
 
   <path id="javac.srcdirs.additional">
-    <filelist dir="/" files="${ADDITIONAL_SRC_DIRS}" />
+    <filelist files="${ADDITIONAL_SRC_DIRS}" />
   </path>
 
   <property-value name="javac.srcdir" value="src:${toString:javac.srcdirs.additional}"/>
 
   <property-location name="lib.dir" location="${PRODUCT_DIR}/lib.java"
       check-exists="false"/>
   <property-location name="dest.dir" location="${PRODUCT_DIR}/java/${PACKAGE_NAME}"
       check-exists="false"/>
 
   <target name="init">
@@ skipping 28 matching lines @@
     <!-- Create the distribution directory -->
     <mkdir dir="${lib.dir}" />
     <jar jarfile="${lib.dir}/chromium_${PACKAGE_NAME}.jar" basedir="${dest.dir}"/>
   </target>
 
   <target name="clean" description="clean up">
     <!-- Delete the appropriate directory trees -->
     <delete dir="${dest.dir}" />
   </target>
 </project>