Inline extensions .gypi files into GN build.

extensions/common/api/api.gyp

-# Copyright 2014 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.
-
-{
-  'targets': [
-    {
-      # GN version: //extensions/common/api:mojom
-      'target_name': 'extensions_api_mojom',
-      # The type of this target must be none. This is so that resources can
-      # depend upon this target for generating the js bindings files. Any
-      # generated cpp files must be listed explicitly in chrome_api.
-      'type': 'none',
-      'includes': [
-        '../../../mojo/mojom_bindings_generator.gypi',
-      ],
-      'sources': [
-        'mime_handler.mojom',
-      ],
-      'variables': {
-        'use_new_wrapper_types': 'false',
-      },
-    },
-    {
-      # GN version: //extensions/common/api
-      'target_name': 'extensions_api',
-      'type': 'static_library',
-      # TODO(jschuh): http://crbug.com/167187 size_t -> int
-      'msvs_disabled_warnings': [ 4267 ],
-      'includes': [
-        '../../../build/json_schema_bundle_compile.gypi',
-        '../../../build/json_schema_compile.gypi',
-        'schemas.gypi',
-      ],
-      'dependencies': [
-        'extensions_api_mojom',
-        '../../../mojo/mojo_public.gyp:mojo_cpp_bindings',
-      ],
-      'sources': [
-        '<(SHARED_INTERMEDIATE_DIR)/extensions/common/api/mime_handler.mojom.cc',
-        '<(SHARED_INTERMEDIATE_DIR)/extensions/common/api/mime_handler.mojom.h',
-      ],
-    },
-    {
-      # Protobuf compiler / generator for chrome.cast.channel-related protocol buffers.
-      # GN version: //extensions/browser/api/cast_channel:cast_channel_proto
-      'target_name': 'cast_channel_proto',
-      'type': 'static_library',
-      'sources': [
-          'cast_channel/authority_keys.proto',
-          'cast_channel/cast_channel.proto',
-          'cast_channel/logging.proto',
-      ],
-      'variables': {
-          'proto_in_dir': 'cast_channel',
-          'proto_out_dir': 'extensions/common/api/cast_channel',
-      },
-      'includes': [ '../../../build/protoc.gypi' ]
-    },
-  ],
-}