Revert of Cleanup: Remove remaining generated extensions APIs on Android.

extensions/common/api/schemas.gypi

Index: extensions/common/api/schemas.gypi
diff --git a/extensions/common/api/schemas.gypi b/extensions/common/api/schemas.gypi
index d9649bad9e32e62ebc9a9aae8fd8eb081cd6e2a0..1b140bd01ba8d1452358f2b4043faddfa7398c0d 100644
--- a/extensions/common/api/schemas.gypi
+++ b/extensions/common/api/schemas.gypi
@@ -8,6 +8,10 @@
   ],
   'variables': {
     'chromium_code': 1,
+    # TODO: Eliminate these on Android. See crbug.com/305852.
+    'android_schema_files': [
+      'runtime.json',
+    ],
     'main_schema_files': [
       'app_current_window_internal.idl',
       'app_runtime.idl',
@@ -46,9 +50,6 @@
     ],
     'non_compiled_schema_files': [
     ],
-    # TODO(thestig) Do not include this file in non-extensions builds.
-    # Then the conditional and else block can go away.
-    # Do the same for extensions/common/api/schemas.gni.
     'conditions': [
       ['enable_extensions==1', {
         'schema_files': [
@@ -56,6 +57,7 @@
         ],
       }, {
         'schema_files': [
+          '<@(android_schema_files)',
         ],
       }],
     ],