Insert default stylesheet for platform apps.

chrome/renderer/extensions/extension_dispatcher.h

Index: chrome/renderer/extensions/extension_dispatcher.h
diff --git a/chrome/renderer/extensions/extension_dispatcher.h b/chrome/renderer/extensions/extension_dispatcher.h
index 1dc917f8e48e8d308fca58a3a5563e288df77b07..ea8677c4617b27d782a37ec32a945627b582c108 100644
--- a/chrome/renderer/extensions/extension_dispatcher.h
+++ b/chrome/renderer/extensions/extension_dispatcher.h
@@ -100,6 +100,8 @@ class ExtensionDispatcher : public content::RenderProcessObserver {
   void OnDeliverMessage(int target_port_id, const std::string& message);
   void OnSetFunctionNames(const std::vector<std::string>& names);
   void OnLoaded(const ExtensionMsg_Loaded_Params& params);
+  void OnStartBatchLoad();
+  void OnEndBatchLoad();
   void OnUnloaded(const std::string& id);
   void OnSetScriptingWhitelist(
       const Extension::ScriptingWhitelist& extension_ids);
@@ -172,6 +174,12 @@ class ExtensionDispatcher : public content::RenderProcessObserver {
   bool webrequest_adblock_plus_;
   bool webrequest_other_;
 
+  // Whether we're in the middle of an ExtensionMsg_StartBatchLoad sequence.
+  bool is_batch_load_in_progress_;
+
+  // Extensions needing a platform-app stylesheet.
+  ExtensionSet extensions_needing_stylesheet_;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionDispatcher);
 };