android: Create a GN template for create_dist_jar.py

build/android/gyp/write_build_config.py

Index: build/android/gyp/write_build_config.py
diff --git a/build/android/gyp/write_build_config.py b/build/android/gyp/write_build_config.py
index 6c29b8957c6fc89a79138c48acae32e04e9e0e96..d2b044a5e79c8597650afd5e9ac124514ddea06e 100755
--- a/build/android/gyp/write_build_config.py
+++ b/build/android/gyp/write_build_config.py
@@ -338,6 +338,7 @@ def main(argv):
       'android_resources': ['build_config', 'resources_zip'],
       'android_apk': ['build_config', 'jar_path', 'dex_path', 'resources_zip'],
       'deps_dex': ['build_config', 'dex_path'],
+      'dist_jar': ['build_config'],
       'resource_rewriter': ['build_config'],
       'group': ['build_config'],
   }
@@ -631,14 +632,19 @@ def main(argv):
       'full_classpath': java_full_classpath
     }
 
-  if options.type == 'android_apk':
+  if options.type in ('android_apk', 'dist_jar'):
     dependency_jars = [c['jar_path'] for c in all_library_deps]

[mbonadei1, 2017/01/12 16:04:32]

For the "android_library" use case I think that we should just include
direct_library_deps instead of all_library_deps.
If we go with all_library_deps we end up with a huge jar wit lots of stuff not
directly related. Do you agree?

-    all_interface_jars = [
-        _AsInterfaceJar(p) for p in dependency_jars + [options.jar_path]]
+    all_interface_jars = [_AsInterfaceJar(p) for p in dependency_jars]
+    if options.type == 'android_apk':
+      all_interface_jars.append(_AsInterfaceJar(options.jar_path))
+
     config['dist_jar'] = {
       'dependency_jars': dependency_jars,
       'all_interface_jars': all_interface_jars,
     }
+
+  if options.type == 'android_apk':
+    dependency_jars = [c['jar_path'] for c in all_library_deps]
     manifest = AndroidManifest(options.android_manifest)
     deps_info['package_name'] = manifest.GetPackageName()
     if not options.tested_apk_config and manifest.GetInstrumentation():