Introduce chrome.shell.createWindow stub API for app_shell

apps/shell/common/api/api.gyp

Index: apps/shell/common/api/api.gyp
diff --git a/apps/common/api/api.gyp b/apps/shell/common/api/api.gyp
similarity index 64%
copy from apps/common/api/api.gyp
copy to apps/shell/common/api/api.gyp
index 5f1fb93be465dc9871c8e01c4b63437c562818de..bbefdb898ef3f4b2cc8c55fd5d1c01d224687ee8 100644
--- a/apps/common/api/api.gyp
+++ b/apps/shell/common/api/api.gyp
@@ -5,7 +5,7 @@
 {
   'targets': [
     {
-      'target_name': 'apps_api',
+      'target_name': 'shell_api',
       'type': 'static_library',
       'sources': [
         '<@(schema_files)',
@@ -13,8 +13,8 @@
       # 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',
+        '../../../../build/json_schema_bundle_compile.gypi',
+        '../../../../build/json_schema_compile.gypi',
       ],
       'variables': {
         'chromium_code': 1,
@@ -22,14 +22,14 @@
         ],
         # TODO: Eliminate these on Android. See crbug.com/305852.
         'schema_files': [
-          'app_runtime.idl',
+          'shell.idl',
         ],
-        'cc_dir': 'apps/common/api',
-        'root_namespace': 'apps::api',
-        'impl_dir': 'apps/browser/api',
+        'cc_dir': 'apps/shell/common/api',
+        'root_namespace': 'apps::shell_api',
+        'impl_dir': 'apps/shell/browser/api',
       },
       'dependencies': [
-        # None yet, but some may need to be added as more APIs move in.
+        '<(DEPTH)/skia/skia.gyp:skia',
       ],
     },
   ],