Re-invent page aligning libraries in APK file.

build/android/rezip.gyp

Index: build/android/rezip.gyp
diff --git a/build/android/rezip.gyp b/build/android/rezip.gyp
index b06ac52cb24ccd927e5d08b0ff3eeb113e555d4d..13b9e4b843d210150274e76515f32fc5ce6c9f2b 100644
--- a/build/android/rezip.gyp
+++ b/build/android/rezip.gyp
@@ -18,6 +18,41 @@
       'sources': [
         'rezip/rezip.cc',
       ],
+    },
+    {
+      'target_name': 'rezip_apk_jar',
+      'type': 'none',
+      'variables': {
+        'java_in_dir': 'rezip',
+        'compile_stamp': '<(SHARED_INTERMEDIATE_DIR)/<(_target_name)/compile.stamp',
+        'javac_jar_path': '<(PRODUCT_DIR)/lib.java/rezip_apk.jar',
+      },
+      'actions': [
+        {
+          'action_name': 'javac_<(_target_name)',
+          'message': 'Compiling <(_target_name) java sources',
+          'variables': {
+            'java_sources': ['>!@(find >(java_in_dir) -name "*.java")'],
+          },
+          'inputs': [
+            '<(DEPTH)/build/android/gyp/util/build_utils.py',
+            '<(DEPTH)/build/android/gyp/javac.py',
+            '>@(java_sources)',
+          ],
+          'outputs': [
+            '<(compile_stamp)',
+            '<(javac_jar_path)',
+          ],
+          'action': [
+            'python', '<(DEPTH)/build/android/gyp/javac.py',
+            '--classpath=',
+            '--classes-dir=<(SHARED_INTERMEDIATE_DIR)/<(_target_name)',
+            '--jar-path=<(javac_jar_path)',
+            '--stamp=<(compile_stamp)',
+            '>@(java_sources)',
+          ]
+        },
+      ],
     }
   ],
 }