Make the ENABLE_APP_LIST build flag work on Linux

chrome/common/extensions/api/schemas.gypi

Index: chrome/common/extensions/api/schemas.gypi
diff --git a/chrome/common/extensions/api/schemas.gypi b/chrome/common/extensions/api/schemas.gypi
index 1518b9434ebdb34c1eae5d93b7f1e160d53ab781..be71d272571d5270a468f9b15a73ff5c892a8bcc 100644
--- a/chrome/common/extensions/api/schemas.gypi
+++ b/chrome/common/extensions/api/schemas.gypi
@@ -55,7 +55,6 @@
       'inline_install_private.idl',
       'instance_id.json',
       'language_settings_private.idl',
-      'launcher_page.idl',
       'location.idl',
       'manifest_types.json',
       'media_galleries.idl',
@@ -91,6 +90,9 @@
       'webstore_widget_private.idl',
       'windows.json',
     ],
+    'app_list_schema_files': [
+      'launcher_page.idl',
+    ],
     'main_schema_include_rules': [
       'extensions/common/api:extensions::api::%(namespace)s',
     ],
@@ -169,6 +171,11 @@
     # Disable schema compiler to generate model extension API code.
     # Only register the extension functions in extension system.
     'conditions': [
+      ['enable_app_list==1', {
+        'schema_files': [
+          '<@(app_list_schema_files)',
+        ],
+      }],
       ['chromeos==1', {
         'schema_files': [
           '<@(chromeos_schema_files)',