[mojo] Add typemap and variant support to generators

third_party/mojo/mojom_bindings_generator_explicit.gypi

 # Copyright 2013 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.
 
 {
   'includes': [
     'mojom_bindings_generator_variables.gypi',
   ],
   'variables': {
+    'variables': {
+      'mojom_variant%': 'none',
+    },
+    'mojom_variant%': '<(mojom_variant)',
     'mojom_base_output_dir':
         '<!(python <(DEPTH)/build/inverse_depth.py <(DEPTH))',
     'mojom_generated_outputs': [
-      '<!@(python <(DEPTH)/mojo/public/tools/bindings/mojom_list_outputs.py --basedir <(mojom_base_output_dir) <@(mojom_files))',
+      '<!@(python <(DEPTH)/mojo/public/tools/bindings/mojom_list_outputs.py --basedir <(mojom_base_output_dir) --variant <(mojom_variant) <@(mojom_files))',
     ],
     'mojom_include_path%': '<(DEPTH)',
+    'mojom_extra_generator_args%': [],
     'require_interface_bindings%': 1,
+    'conditions': [
+      ['mojom_variant=="none"', {
+        'mojom_output_languages%': 'c++,javascript,java',
+      }, {
+        'mojom_output_languages%': 'c++',
+      }],
+    ],
   },
   # Given mojom files as inputs, generate sources.  These sources will be
   # exported to another target (via dependent_settings) to be compiled.  This
   # keeps code generation separate from compilation, allowing the same sources
   # to be compiled with multiple toolchains - target, NaCl, etc.
   'actions': [
     {
       'variables': {
         'java_out_dir': '<(PRODUCT_DIR)/java_mojo/<(_target_name)/src',
         'stamp_filename': '<(PRODUCT_DIR)/java_mojo/<(_target_name)/<(_target_name).stamp',
@@ skipping 29 matching lines @@
         '<@(mojom_generated_outputs)',
       ],
       'action': [
         'python', '<@(mojom_bindings_generator)',
         '<@(mojom_files)',
         '--use_bundled_pylibs',
         '-d', '<(DEPTH)',
         '<@(mojom_import_args)',
         '-o', '<(SHARED_INTERMEDIATE_DIR)',
         '--java_output_directory=<(java_out_dir)',
+        '--variant', '<(mojom_variant)',
+        '-g', '<(mojom_output_languages)',
+        '<@(mojom_extra_generator_args)',
       ],
       'message': 'Generating Mojo bindings from <@(mojom_files)',
     }
   ],
   'conditions': [
     ['require_interface_bindings==1', {
       'dependencies': [
         '<(DEPTH)/base/base.gyp:base',
         '<(DEPTH)/third_party/mojo/mojo_public.gyp:mojo_interface_bindings_generation',
       ],
@@ skipping 31 matching lines @@
         ],
         'additional_input_paths': [
           '<@(mojom_bindings_generator_sources)',
           '<@(mojom_files)',
         ],
         'mojom_generated_sources': [ '<@(mojom_generated_outputs)' ],
       },
     }
   },
 }