Don't use browser windows for platform app shell windows

chrome/renderer/extensions/schema_generated_bindings.cc

Index: chrome/renderer/extensions/schema_generated_bindings.cc
diff --git a/chrome/renderer/extensions/schema_generated_bindings.cc b/chrome/renderer/extensions/schema_generated_bindings.cc
index a89c95fd49bcf9b5807de52b7ffdb9fec6427443..059a41d52b26bf51b01a598f0913c8ee85f1b9c6 100644
--- a/chrome/renderer/extensions/schema_generated_bindings.cc
+++ b/chrome/renderer/extensions/schema_generated_bindings.cc
@@ -276,6 +276,8 @@ class ExtensionImpl : public ChromeV8Extension {
       view_type = chrome::VIEW_TYPE_EXTENSION_POPUP;
     } else if (view_type_string == chrome::kViewTypeExtensionDialog) {
       view_type = chrome::VIEW_TYPE_EXTENSION_DIALOG;
+    } else if (view_type_string == chrome::kViewTypeAppShell) {
+      view_type = chrome::VIEW_TYPE_APP_SHELL;
     } else if (view_type_string != chrome::kViewTypeAll) {
       return v8::Undefined();
     }