[Android] Generate localized strings.xml files at build time.

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 41 matching lines @@
 #  is_test_apk - Set to 1 if building a test apk.  This prevents resources from
 #    dependencies from being re-included.
 #  native_libs_paths - The path to any native library to be included in this
 #    target. This should be a path in <(SHARED_LIB_DIR). A stripped copy of
 #    the library will be included in the apk and symbolic links to the
 #    unstripped copy will be added to <(android_product_out) to enable native
 #    debugging.
 #  resource_dir - The directory for resources.
 #  R_package - A custom Java package to generate the resource file R.java in.
 #    By default, the package given in AndroidManifest.xml will be used.
+#  java_strings_grd - The name of the grd file from which to generate localized
+#    strings.xml files, if any.
 
 {
   'variables': {
     'asset_location%': '',
     'additional_input_paths': [],
     'input_jars_paths': [],
     'additional_src_dirs': [],
     'generated_src_dirs': [],
     'app_manifest_version_name%': '<(android_app_version_name)',
     'app_manifest_version_code%': '<(android_app_version_code)',
     'proguard_enabled%': 'false',
     'proguard_flags%': '',
     'native_libs_paths': [],
     'jar_name%': 'chromium_apk_<(package_name).jar',
     'resource_dir%':'',
     'R_package%':'',
     'additional_res_dirs': [],
     'additional_res_packages': [],
     'is_test_apk%': 0,
+    'java_strings_grd%': '',
+    'grit_grd_file%': '',
   },
   'sources': [
       '<@(native_libs_paths)'
   ],
   # Pass the jar path to the apk's "fake" jar target.  This would be better as
   # direct_dependent_settings, but a variable set by a direct_dependent_settings
   # cannot be lifted in a dependent to all_dependent_settings.
   'all_dependent_settings': {
     'variables': {
       'apk_output_jar_path': '<(PRODUCT_DIR)/lib.java/<(jar_name)',
@@ skipping 13 matching lines @@
       # both strip the library and create the link in <(link_dir) a separate
       # script is required.
       'action': [
         '<(DEPTH)/build/android/prepare_library_for_apk',
         '<(android_strip)',
         '<(RULE_INPUT_PATH)',
         '<(stripped_library_path)',
       ],
     },
   ],
+  'conditions': [
+    ['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)'],
+      },
+    }],
+    ['java_strings_grd != ""', {
+      'variables': {
+        'out_res_dir': '<(SHARED_INTERMEDIATE_DIR)/<(package_name)_apk/res',
+        'additional_res_dirs': ['<(out_res_dir)'],
+        # grit_grd_file is used by grit_action.gypi, included below.
+        'grit_grd_file': '<(java_in_dir)/strings/<(java_strings_grd)',
+      },
+      'actions': [
+        {
+          'action_name': 'generate_localized_strings_xml',
+          'variables': {
+            'grit_out_dir': '<(out_res_dir)',
+            # resource_ids is unneeded since we don't generate .h headers.
+            'grit_resource_ids': '',
+          },
+          'includes': ['../build/grit_action.gypi'],
+        },
+      ],
+    }],
+  ],
   'actions': [
     {
       'action_name': 'ant_<(package_name)_apk',
       'message': 'Building <(package_name) apk.',
       'inputs': [
         '<(java_in_dir)/AndroidManifest.xml',
         '<(DEPTH)/build/android/ant/chromium-apk.xml',
         '<(DEPTH)/build/android/ant/common.xml',
         '<(DEPTH)/build/android/ant/sdk-targets.xml',
         # 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)',
         '>@(native_libs_paths)',
         '>@(additional_input_paths)',
       ],
       'conditions': [
         ['resource_dir!=""', {
           'inputs': ['<!@(find <(java_in_dir)/<(resource_dir) -name "*")']
         }],
+        ['java_strings_grd != ""', {
+          'inputs': [
+            # TODO(newt): replace this with .../values/strings.xml once
+            # the English strings.xml is generated as well? That would be
+            # simpler and faster and should be equivalent.
+            '<!@pymod_do_main(grit_info <@(grit_defines) --outputs "<(out_res_dir)" <(grit_grd_file))',
+          ],
+        }],
         ['is_test_apk == 1', {
           'variables': {
             'additional_res_dirs=': [],
             'additional_res_packages=': [],
           }
         }],
         ['proguard_enabled == "true" and proguard_flags != ""', {
           'inputs': ['<(java_in_dir)/<(proguard_flags)']
         }]
       ],
@@ skipping 31 matching lines @@
         '-Dbasedir=<(java_in_dir)',
         '-buildfile',
         '<(DEPTH)/build/android/ant/chromium-apk.xml',
 
         # Specify CONFIGURATION_NAME as the target for ant to build. The
         # buildfile will then build the appropriate SDK tools target.
         '<(CONFIGURATION_NAME)',
       ]
     },
   ],
-  'conditions': [
-    ['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)'],
-      },
-    }],
-  ],
 }