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

build/android/ant/common.xml

Index: build/android/ant/common.xml
diff --git a/build/android/ant/common.xml b/build/android/ant/common.xml
new file mode 100644
index 0000000000000000000000000000000000000000..f759c40298eb769e4216e53ae6c6f0fc00602a13
--- /dev/null
+++ b/build/android/ant/common.xml
@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  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="chrome_common_defines">
+  <!--

[nilesh, 2012/07/25 16:57:22]

<!-- Common build properties for Chrome for android. -->

For one line comments?

[Yaron, 2012/07/25 18:12:23]

Done.

+       Common build properties for Chrome for android.
+  -->
+
+<!-- Macro for checking that a property is correctly set.

[nilesh, 2012/07/25 16:57:22]

We should settle on one format for multi-line comments.
What about the format at the top.
<!--
  ....
-->

[Yaron, 2012/07/25 18:12:23]

Done.

+     Performs checks for:
+     1. Property is set and not null.
+     2. String value of property does not contains any '$' signs.
+-->
+  <macrodef name="check-property-value">
+    <attribute name="property" />
+    <sequential>
+      <fail message ="Property @{property} is not set.">
+        <condition>
+          <or>
+            <not> <isset property="@{property}" /> </not>
+            <length string="${@{property}}" trim="true" when="less" length="1" />
+          </or>
+        </condition>
+      </fail>
+      <!-- Check for $ signs. This catches errors when properties are
+           initialized from environment variables.
+           E.g. if we have <property name="foo" value="${env.bar}" /> but env.bar is
+           not set then foo will have the literal value of '${env.bar}'.
+           -->

[nilesh, 2012/07/25 16:57:22]

Match this with <!--

[Yaron, 2012/07/25 18:12:23]

Done.

+      <fail message="Value checked failed for property: @{property} : ${@{property}}.
+Property value contains an uninitialized environment variable.">
+        <condition>
+          <contains string="${@{property}}" substring="$" />
+      </condition>

[nilesh, 2012/07/25 16:57:22]

fix indent.

[Yaron, 2012/07/25 18:12:23]

Done.

+    </fail>
+    </sequential>
+  </macrodef>
+
+  <!-- A safe setter for location properties. Checks that a location is not
+       empty and actually exists. For specifying output directories, location
+       check can be disabled by specifying check-exists ="false"
+   -->

[nilesh, 2012/07/25 16:57:22]

This has a different indentation than the comments at the top.

[Yaron, 2012/07/25 18:12:23]

Done.

+  <macrodef name="property-location">
+    <attribute name="name" />
+    <attribute name="location" />
+    <attribute name="check-exists" default="true" />
+    <sequential>
+      <property name="@{name}" location="@{location}" />
+      <check-property-value property="@{name}" />
+      <fail message="Location specified for @{name} : @{location} does not exist.">
+        <condition>
+          <and>
+            <equals arg1="@{check-exists}" arg2="true" />
+            <not> <available type="dir" file="@{location}" /> </not>
+          </and>
+        </condition>
+      </fail>
+    </sequential>
+  </macrodef>
+
+  <!-- A safe setter for property values -->
+  <macrodef name="property-value">
+    <attribute name="name" />
+    <attribute name="value" />
+    <sequential>
+      <property name="@{name}" value="@{value}" />
+      <check-property-value property="@{name}" />
+    </sequential>
+  </macrodef>
+
+
+ <!-- Common environment properties. -->
+
+  <property environment="env" />
+  <property-location name="sdk.dir" location="${env.ANDROID_SDK_ROOT}" />
+  <property-location name="toolchain.dir" location="${env.ANDROID_TOOLCHAIN}" />
+  <property name="source.dir" location="src" />
+  <property-value name="target" value="android-${env.ANDROID_SDK_VERSION}" />
+  <property-value name="sdk.version" value="${env.ANDROID_SDK_VERSION}" />
+
+  <!-- Set path depending on the type of repository. If ANDROID_BUILD_TOP is
+    set then build using the provided location. Otherwise, assume the build
+    is using the released SDK and set the path accordingly. -->
+  <condition property="location.base"
+             value="${sdk.dir}"
+             else="${sdk.dir}/platforms/android-${sdk.version}">
+    <isset property="env.ANDROID_BUILD_TOP" />
+  </condition>
+</project>
+

[nilesh, 2012/07/25 16:57:22]

remove trailing new lines.

+