Insert default stylesheet for platform apps.

chrome/common/extensions/extension_messages.h

Index: chrome/common/extensions/extension_messages.h
diff --git a/chrome/common/extensions/extension_messages.h b/chrome/common/extensions/extension_messages.h
index f77916bfeb5c26cecc8676517a4aa5c442d90ca2..f6a40c3919dac5ac6424842c3797b75494d67fa5 100644
--- a/chrome/common/extensions/extension_messages.h
+++ b/chrome/common/extensions/extension_messages.h
@@ -91,9 +91,11 @@ struct ExtensionMsg_Loaded_Params {
   ~ExtensionMsg_Loaded_Params();
   explicit ExtensionMsg_Loaded_Params(const Extension* extension);
 
-  // A copy constructor is needed because this structure can end up getting
-  // copied inside the IPC machinery on gcc <= 4.2.
+  // ExtensionMsg_Loaded uses a std:vector, so we need to be copyable
+  // and assignable.
   ExtensionMsg_Loaded_Params(const ExtensionMsg_Loaded_Params& other);
+  ExtensionMsg_Loaded_Params& operator=(
+      const ExtensionMsg_Loaded_Params& other);
 
   // Creates a new extension from the data in this object.
   scoped_refptr<Extension> ConvertToExtension() const;
@@ -194,9 +196,9 @@ IPC_MESSAGE_CONTROL1(ExtensionMsg_ActivateExtension,
 IPC_MESSAGE_CONTROL1(ExtensionMsg_ActivateApplication,
                      std::string /* extension_id */)
 
-// Notifies the renderer that an extension was loaded in the browser.
+// Notifies the renderer that extensions were loaded in the browser.
 IPC_MESSAGE_CONTROL1(ExtensionMsg_Loaded,
-                     ExtensionMsg_Loaded_Params)
+                     std::vector<ExtensionMsg_Loaded_Params>)
 
 // Notifies the renderer that an extension was unloaded in the browser.
 IPC_MESSAGE_CONTROL1(ExtensionMsg_Unloaded,