[Android] Add chrome_java target for building Java code in the chromium layer.

content/shell/android/java/content_shell_apk.xml

Index: content/shell/android/java/content_shell_apk.xml
diff --git a/content/shell/android/java/content_shell_apk.xml b/content/shell/android/java/content_shell_apk.xml
index 2b476119f7478f4b7adfaaa112e2fa8b6cf9a619..7d22022d247e5a54472c2b1e89f8d88c53219dff 100644
--- a/content/shell/android/java/content_shell_apk.xml
+++ b/content/shell/android/java/content_shell_apk.xml
@@ -9,29 +9,27 @@
   <description>
     Building ContentShell.apk
   </description>
-
-  <property environment="env"/>
-  <property name="sdk.dir" location="${env.ANDROID_SDK_ROOT}"/>
-  <property name="toolchain.dir" location="${env.ANDROID_TOOLCHAIN}"/>
-  <property name="source.dir" location="src"/>
-  <property name="target" value="android-${env.ANDROID_SDK_VERSION}"/>
-  <property name="target.abi" value="${APP_ABI}"/>
-  <property name="out.dir" location="${PRODUCT_DIR}/content_shell"/>
-  <property name="resource.absolute.dir" value="../res"/>
-  <property name="gen.absolute.dir" value="${out.dir}/gen"/>
+  <import file="../../../../build/android/ant/common.xml" />
+  <import file="../../../../build/android/ant/sdk-targets.xml" />
+  <property-value name="target.abi" value="${APP_ABI}" />
+  <property-location name="out.dir" location="${PRODUCT_DIR}/content_shell"
+    check-exists="false" />
+  <property name="resource.absolute.dir" value="../res" />
+  <property name="gen.absolute.dir" value="${out.dir}/gen" />
+  <property name="jar.libs.dir" value="${out.dir}/java/libs" />
   <path id="native.libs.gdbserver">
-    <fileset file="${toolchain.dir}/../../gdbserver"/>
+    <fileset file="${toolchain.dir}/../../gdbserver" />
   </path>
   <property name="native.libs.absolute.dir" location="${out.dir}/libs" />
   <property name="asset.absolute.dir" location="${out.dir}/assets" />
 
   <path id="out.dex.jar.input.ref">
-    <fileset file="${out.dir}/java/libs/chromium_content.jar"/>
-    <fileset file="${out.dir}/java/libs/chromium_net.jar"/>
-    <fileset file="${out.dir}/java/libs/chromium_base.jar"/>
-    <fileset file="${out.dir}/java/libs/chromium_media.jar"/>
+    <fileset file="${out.dir}/java/libs/chromium_content.jar" />
+    <fileset file="${out.dir}/java/libs/chromium_net.jar" />
+    <fileset file="${out.dir}/java/libs/chromium_base.jar" />
+    <fileset file="${out.dir}/java/libs/chromium_media.jar" />
   </path>
-  <property name="java.compilerargs" value="-classpath ${toString:out.dex.jar.input.ref}"/>
+  <property name="java.compilerargs" value="-classpath ${toString:out.dex.jar.input.ref}" />
 
   <!-- We expect PRODUCT_DIR to be set like the gyp var
        (e.g. $ROOT/out/Debug) -->
@@ -54,14 +52,18 @@
         <equals arg1="${build.target}" arg2="debug" />
       </condition>
       <then>
-        <echo message="Copying gdbserver to the apk to enable native debugging"/>
+        <echo message="Copying gdbserver to the apk to enable native debugging" />
         <copy todir="${out.dir}/libs/${target.abi}">
-          <path refid="native.libs.gdbserver"/>
+          <path refid="native.libs.gdbserver" />
         </copy>
       </then>
     </if>
   </target>
 
-  <import file="${sdk.dir}/tools/ant/build.xml" />
+<!-- Classpath for javac -->
+ <path id="javac.custom.classpath">
+   <path refid="out.dex.jar.input.ref" />
+ </path>
+ <import file="${sdk.dir}/tools/ant/build.xml" />
 
 </project>