Build chrome.input.ime.* API in GN mode.

chrome/common/extensions/api/schemas.gypi

 # 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.
 
 {
   'sources': [
     '<@(schema_files)',
   ],
   'variables': {
     'main_schema_files': [
@@ skipping 153 matching lines @@
     # Disable schema compiler to generate model extension API code.
     # Only register the extension functions in extension system.
     'conditions': [
       ['chromeos==1', {
         'schema_files': [
           '<@(chromeos_schema_files)',
         ],
         'non_compiled_schema_files': [
           '<@(chromeos_non_compiled_schema_files)',
         ],
-      }],
-      ['OS=="linux" or OS=="win"', {
-        'schema_files': [
-          'input_ime.json',
-        ],
+      }, { # chromeos==0
+        'conditions': [
+          ['OS=="linux" or OS=="win"', {
+            'schema_files': [
+              'input_ime.json',
+            ],
+          }],
+        ],
       }],
       ['enable_webrtc==1', {
         'schema_files': [
           '<@(webrtc_schema_files)',
         ],
       }],
       ['OS!="android"', {
         'schema_files': [
           '<@(non_android_schema_files)',
         ],
       }],
     ],
     'cc_dir': 'chrome/common/extensions/api',
     'root_namespace': 'extensions::api::%(namespace)s',
     'bundle_name': 'Chrome',
     'impl_dir_': 'chrome/browser/extensions/api',
   },
 }