Make the build control what library(/ies) to load

build/java_apk.gypi

 # 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.
 
 # This file is meant to be included into a target to provide a rule
 # to build Android APKs in a consistent manner.
 #
 # To use this, create a gyp target with the following form:
 # {
 #   'target_name': 'my_package_apk',
@@ skipping 55 matching lines @@
     'R_package%':'',
     'additional_res_dirs': [],
     'additional_res_packages': [],
     'is_test_apk%': 0,
     'java_strings_grd%': '',
     'library_manifest_paths' : [],
     'resource_input_paths': [],
     'intermediate_dir': '<(PRODUCT_DIR)/<(_target_name)',
     'asset_location%': '<(intermediate_dir)/assets',
     'codegen_stamp': '<(intermediate_dir)/codegen.stamp',
+    'compile_input_paths': [ ],
+    'ordered_libraries_file': '<(intermediate_dir)/native_libraries.json',
+    # TODO(cjhopman): build/ shouldn't refer to content/. The libraryloader and
+    # nativelibraries template should be moved out of content/ (to base/?).
+    # http://crbug.com/225101
+    'native_libraries_template': '<(DEPTH)/content/public/android/java/templates/NativeLibraries.template',
+    'native_libraries_java_dir': '<(intermediate_dir)/native_libraries_java/',
+    'native_libraries_java_file': '<(native_libraries_java_dir)/NativeLibraries.java',
+    'native_libraries_java_stamp': '<(intermediate_dir)/native_libraries_java.stamp',
+    'native_libraries_template_data_dir': '<(intermediate_dir)/native_libraries/',
+    'native_libraries_template_data_file': '<(native_libraries_template_data_dir)/native_libraries_array.h',
+    'native_libraries_template_data_stamp': '<(intermediate_dir)/native_libraries_template_data.stamp',
     'compile_stamp': '<(intermediate_dir)/compile.stamp',
     'jar_stamp': '<(intermediate_dir)/jar.stamp',
     'obfuscate_stamp': '<(intermediate_dir)/obfuscate.stamp',
     'classes_dir': '<(intermediate_dir)/classes',
     'javac_includes': [],
     'jar_excluded_classes': [],
     'jar_path': '<(PRODUCT_DIR)/lib.java/<(jar_name)',
     'obfuscated_jar_path': '<(intermediate_dir)/obfuscated.jar',
     'dex_path': '<(intermediate_dir)/classes.dex',
     'android_manifest': '<(java_in_dir)/AndroidManifest.xml',
@@ skipping 41 matching lines @@
     }],
     ['R_package != ""', {
       'variables': {
         # We generate R.java in package R_package (in addition to the package
         # listed in the AndroidManifest.xml, which is unavoidable).
         'additional_res_dirs': ['<(DEPTH)/build/android/ant/empty/res'],
         'additional_res_packages': ['<(R_package)'],
         'additional_R_text_files': ['<(PRODUCT_DIR)/<(package_name)/R.txt'],
       },
     }],
+    ['native_libs_paths != []', {
+      'variables': {
+        'compile_input_paths': [ '<(native_libraries_java_stamp)' ],
+        'generated_src_dirs': [ '<(native_libraries_java_dir)' ],
+      },
+      'actions': [
+        {
+          'action_name': 'ordered_libraries_<(_target_name)',
+          'message': 'Writing dependency ordered libraries for <(_target_name).',
+          'inputs': [
+            '<(DEPTH)/build/android/pylib/build_utils.py',
+            '<(DEPTH)/build/android/write_ordered_libraries.py',
+            '<@(native_libs_paths)',
+          ],
+          'outputs': [
+            '<(ordered_libraries_file)',
+          ],
+          'action': [
+            'python', '<(DEPTH)/build/android/write_ordered_libraries.py',
+            '--input-libraries=<(native_libs_paths)',
+            '--output=<(ordered_libraries_file)',
+          ],
+        },
+        {
+          'action_name': 'native_libraries_template_data_<(_target_name)',
+          'message': 'Creating native_libraries_list.h for <(_target_name).',
+          'inputs': [
+            '<(DEPTH)/build/android/pylib/build_utils.py',
+            '<(DEPTH)/build/android/create_native_libraries_header.py',
+            '<(ordered_libraries_file)',
+          ],
+          'outputs': [
+            '<(native_libraries_template_data_stamp)',
+          ],
+          'action': [
+            'python', '<(DEPTH)/build/android/create_native_libraries_header.py',
+            '--ordered-libraries=<(ordered_libraries_file)',
+            '--output=<(native_libraries_template_data_file)',
+            '--stamp=<(native_libraries_template_data_stamp)',
+          ],
+        },
+        {
+          'action_name': 'native_libraries_<(_target_name)',
+          'message': 'Creating NativeLibraries.java for <(_target_name).',
+          'inputs': [
+            '<(DEPTH)/build/android/pylib/build_utils.py',
+            '<(DEPTH)/build/android/gcc_preprocess.py',
+            '<(native_libraries_template_data_stamp)',
+            '<(native_libraries_template)',
+          ],
+          'outputs': [
+            '<(native_libraries_java_stamp)',
+          ],
+          'action': [
+            'python', '<(DEPTH)/build/android/gcc_preprocess.py',
+            '--include-path=<(native_libraries_template_data_dir)',
+            '--output=<(native_libraries_java_file)',
+            '--template=<(native_libraries_template)',
+            '--stamp=<(native_libraries_java_stamp)',
+          ],
+        },
+      ],
+    }], # native_libs_paths != []
     ['java_strings_grd != ""', {
       'variables': {
         'res_grit_dir': '<(SHARED_INTERMEDIATE_DIR)/<(package_name)_apk/res_grit',
         'additional_res_dirs': ['<(res_grit_dir)'],
         # grit_grd_file is used by grit_action.gypi, included below.
         'grit_grd_file': '<(java_in_dir)/strings/<(java_strings_grd)',
         'resource_input_paths': [
           '<!@pymod_do_main(grit_info <@(grit_defines) --outputs "<(res_grit_dir)" <(grit_grd_file))'
         ],
       },
@@ skipping 69 matching lines @@
         ],
       },
       'inputs': [
         '<(DEPTH)/build/android/pylib/build_utils.py',
         '<(DEPTH)/build/android/javac.py',
         # If there is a separate find for additional_src_dirs, it will find the
         # wrong .java files when additional_src_dirs is empty.
         '>!@(find >(java_in_dir) >(additional_src_dirs) -name "*.java")',
         '>@(input_jars_paths)',
         '<(codegen_stamp)',
+        '>@(compile_input_paths)',
       ],
       'outputs': [
         '<(compile_stamp)',
       ],
       'action': [
         'python', '<(DEPTH)/build/android/javac.py',
         '--output-dir=<(classes_dir)',
         '--classpath=>(input_jars_paths) <(android_sdk_jar)',
         '--src-dirs=>(all_src_dirs)',
         '--javac-includes=<(javac_includes)',
@@ skipping 153 matching lines @@
 
         # Add list of inputs to the command line, so if inputs change
         # (e.g. if a Java file is removed), the command will be re-run.
         # TODO(newt): remove this once crbug.com/177552 is fixed in ninja.
         '-DTHIS_IS_IGNORED=>!(echo \'>(_inputs)\' | md5sum)',
 
       ]
     },
   ],
 }