[Android] Add gyp support for multidex.

build/java.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 Java in a consistent manner.
 #
 # To use this, create a gyp target with the following form:
 # {
 #   'target_name': 'my-package_java',
@@ skipping 46 matching lines @@
     'additional_src_dirs': [],
     'javac_includes': [],
     'jar_name': '<(_target_name).jar',
     'jar_dir': '<(PRODUCT_DIR)/lib.java',
     'jar_path': '<(intermediate_dir)/<(jar_name)',
     'jar_final_path': '<(jar_dir)/<(jar_name)',
     'jar_excluded_classes': [ '*/R.class', '*/R##*.class' ],
     'instr_stamp': '<(intermediate_dir)/instr.stamp',
     'additional_input_paths': [],
     'dex_path': '<(PRODUCT_DIR)/lib.java/<(_target_name).dex.jar',
+    'main_dex_list_path': '<(intermediate_dir)/main_dex_list.txt',
     'generated_src_dirs': ['>@(generated_R_dirs)'],
     'generated_R_dirs': [],
     'has_java_resources%': 0,
     'res_extra_dirs': [],
     'res_extra_files': [],
     'res_v14_skip%': 0,
     'resource_input_paths': ['>@(res_extra_files)'],
     'intermediate_dir': '<(SHARED_INTERMEDIATE_DIR)/<(_target_name)',
     'compile_stamp': '<(intermediate_dir)/compile.stamp',
     'lint_stamp': '<(intermediate_dir)/lint.stamp',
@@ skipping 29 matching lines @@
     'javac_jar_path': '<(javac_jar_path)',
   },
   'conditions': [
     ['add_to_dependents_classpaths == 1', {
       # This all_dependent_settings is used for java targets only. This will add the
       # jar path to the classpath of dependent java targets.
       'all_dependent_settings': {
         'variables': {
           'input_jars_paths': ['<(jar_final_path)'],
           'library_dexed_jars_paths': ['<(dex_path)'],
+          'main_dex_list_paths': ['<(main_dex_list_path)'],
         },
       },
     }],
     ['has_java_resources == 1', {
       'variables': {
         'resource_dir': '<(java_in_dir)/res',
         'res_input_dirs': ['<(resource_dir)', '<@(res_extra_dirs)'],
         'resource_input_paths': ['<!@(find <(resource_dir) -type f)'],
 
         'R_dir': '<(intermediate_dir)/java_R',
@@ skipping 164 matching lines @@
         '--javac-includes=<(javac_includes)',
         '--chromium-code=<(chromium_code)',
         '--jar-path=<(javac_jar_path)',
         '--jar-excluded-classes=<(jar_excluded_classes)',
         '--stamp=<(compile_stamp)',
         '>@(java_sources)',
         '<@(extra_args)',
       ]
     },
     {
+      'action_name': 'main_dex_list_for_<(_target_name)',
+      'variables': {
+        'main_dex_list_script': '<(DEPTH)/build/android/gyp/main_dex_list.py',
+        'main_dex_rules_file': '<(DEPTH)/build/android/main_dex_classes.flags',
+      },
+      'inputs': [
+        '<(javac_jar_path)',
+        '<(main_dex_list_script)',
+        '<(main_dex_rules_file)',
+      ],
+      'outputs': [
+        '<(main_dex_list_path)',
+      ],
+      'action': [
+        'python', '<(main_dex_list_script)',
+        '--main-dex-list-path', '<(main_dex_list_path)',
+        '--main-dex-rules-path', '<(main_dex_rules_file)',
+        '<(javac_jar_path)',
+      ],
+    },
+    {
       'action_name': 'instr_jar_<(_target_name)',
       'message': 'Instrumenting <(_target_name) jar',
       'variables': {
         'input_path': '<(jar_path)',
         'output_path': '<(jar_final_path)',
         'stamp_path': '<(instr_stamp)',
         'instr_type': 'jar',
       },
       'outputs': [
         '<(jar_final_path)',
@@ skipping 49 matching lines @@
             'dex_no_locals': 1,
           }],
         ],
         'dex_input_paths': [ '<(jar_final_path)' ],
         'output_path': '<(dex_path)',
       },
       'includes': [ 'android/dex_action.gypi' ],
     },
   ],
 }