Revert of [Android] Rework multidex and enable multidex for unit_tests_apk. (RELAND)

build/java_apk.gypi

Index: build/java_apk.gypi
diff --git a/build/java_apk.gypi b/build/java_apk.gypi
index 57d8558f1a53be5efdd3f80666479424c74c85cf..ab49dc6ab1b7990be44c07905f906f976fa2ba8a 100644
--- a/build/java_apk.gypi
+++ b/build/java_apk.gypi
@@ -77,7 +77,6 @@
     'tested_apk_obfuscated_jar_path%': '/',
     'tested_apk_dex_path%': '/',
     'tested_apk_is_multidex%': 0,
-    'tested_apk_generated_multidex_config%': 0,
     'additional_input_paths': [],
     'additional_locale_input_paths': [],
     'create_density_splits%': 0,
@@ -122,11 +121,6 @@
     '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_version_file': '<(native_libraries_template_data_dir)/native_libraries_version.h',
-    'generate_multidex_config%': 0,
-    'multidex_config_template': '<(DEPTH)/base/android/java/templates/ChromiumMultiDex.template',
-    'multidex_config_java_dir': '<(intermediate_dir)/multidex_config/',
-    'multidex_config_java_file': '<(multidex_config_java_dir)/ChromiumMultiDex.java',
-    'multidex_config_java_stamp': '<(intermediate_dir)/multidex_config_java.stamp',
     'compile_stamp': '<(intermediate_dir)/compile.stamp',
     'lint_stamp': '<(intermediate_dir)/lint.stamp',
     'lint_result': '<(intermediate_dir)/lint_result.xml',
@@ -272,7 +266,6 @@
           'tested_apk_obfuscated_jar_path': '<(obfuscated_jar_path)',
           'tested_apk_dex_path': '<(dex_path)',
           'tested_apk_is_multidex': '<(enable_multidex)',
-          'tested_apk_generated_multidex_config': '>(generate_multidex_config)',
         }
       }]
     ],
@@ -801,57 +794,36 @@
         },
       ],
     }],
-  ],
-  'target_conditions': [
-    ['generate_multidex_config == 1 and tested_apk_generated_multidex_config == 0', {
-      'variables': {
-        'generated_src_dirs': ['<(multidex_config_java_dir)'],
-      },
+    ['enable_multidex == 1', {
       'actions': [
+        {
+          'action_name': 'main_dex_list_for_<(_target_name)',
+          'variables': {
+            'jar_paths': ['>@(input_jars_paths)', '<(javac_jar_path)'],
+            'output_path': '<(main_dex_list_path)',
+          },
+          'includes': [ 'android/main_dex_action.gypi' ],
+        },
         {
           'action_name': 'configure_multidex_for_<(_target_name)',
           'inputs': [
             '<(DEPTH)/build/android/gyp/configure_multidex.py',
-            '<(multidex_config_template)',
           ],
           'outputs': [
             '<(multidex_configuration_path)',
-            '<(multidex_config_java_stamp)',
           ],
           'variables': {
             'additional_multidex_config_options': [],
-            'enabled_configurations': '>(enable_multidex_configurations)',
-            'conditions': [
-              ['enable_multidex == 1', {
-                'additional_multidex_config_options': ['--enable-multidex'],
-              }],
-            ],
+            'enabled_configurations': ['>@(enable_multidex_configurations)'],
           },
           'action': [
             'python', '<(DEPTH)/build/android/gyp/configure_multidex.py',
             '--configuration-name', '<(CONFIGURATION_NAME)',
             '--enabled-configurations', '<(enabled_configurations)',
             '--multidex-configuration-path', '<(multidex_configuration_path)',
-            '--multidex-config-java-template', '<(multidex_config_template)',
-            '--multidex-config-java-file', '<(multidex_config_java_file)',
-            '--multidex-config-java-stamp', '<(multidex_config_java_stamp)',
             '>@(additional_multidex_config_options)',
           ],
         },
-      ],
-      'conditions': [
-        ['enable_multidex == 1', {
-          'actions': [
-            {
-              'action_name': 'main_dex_list_for_<(_target_name)',
-              'variables': {
-                'jar_paths': ['>@(input_jars_paths)', '<(javac_jar_path)'],
-                'output_path': '<(main_dex_list_path)',
-              },
-              'includes': [ 'android/main_dex_action.gypi' ],
-            },
-          ]
-        }]
       ],
     }],
   ],
@@ -983,9 +955,6 @@
         ['native_lib_target != ""', {
           'inputs': [ '<(native_libraries_java_stamp)' ],
         }],
-        ['generate_multidex_config == 1', {
-          'inputs': [ '<(multidex_config_java_stamp)' ],
-        }],
       ],
       'outputs': [
         '<(compile_stamp)',