Use _target_name instead of package_name for java*.gypi

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
+    The jar will be created as ${JAR_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 files="${INPUT_JARS_PATHS}"/>
     <pathelement location="${ANDROID_SDK}/android.jar"/>
   </path>
 
   <path id="javac.srcdirs.additional">
     <filelist files="${ADDITIONAL_SRC_DIRS}"/>
     <filelist files="${GENERATED_SRC_DIRS}"/>
   </path>
 
   <property-value
     name="javac.srcdir"
     value="src:${toString:javac.srcdirs.additional}"
   />
 
   <property-location
     name="dest.dir"
-    location="${PRODUCT_DIR}/java/${PACKAGE_NAME}"
+    location="${PRODUCT_DIR}/java/${TARGET_NAME}"
     check-exists="false"
   />
 
   <target name="init">
     <!-- Create the time stamp -->
     <tstamp/>
     <!-- Create the build directory structure used by compile -->
     <mkdir dir="${dest.dir}"/>
 
     <!-- Remove all .class files from dest.dir. This prevents inclusion of
@@ skipping 21 matching lines @@
     <javac
       srcdir="${javac.srcdir}"
       destdir="${dest.dir}"
       classpathref="javac.custom.classpath"
       debug="true"
       includeantruntime="false"
     />
   </target>
 
   <target name="dist" depends="compile"
-      description="Generate chromium_${PACKAGE_NAME}.jar.">
+      description="Generate ${JAR_NAME}.">
     <!-- Create the distribution directory -->
     <jar
-      jarfile="${lib.java.dir}/chromium_${PACKAGE_NAME}.jar"
+      jarfile="${lib.java.dir}/${JAR_NAME}"
       basedir="${dest.dir}"
     />
 
     <!-- If Gyp thinks this output is stale but Ant doesn't, the modification
          time should still be updated. Otherwise, this target will continue to
          be rebuilt in future builds.
     -->
-    <touch file="${lib.java.dir}/chromium_${PACKAGE_NAME}.jar"/>
+    <touch file="${lib.java.dir}/${JAR_NAME}"/>
   </target>
 
   <target name="clean" description="clean up">
     <!-- Delete the appropriate directory trees -->
     <delete dir="${dest.dir}"/>
   </target>
 </project>