Delete the GTK+ port of Chrome.

chrome/browser/notifications/balloon_collection_impl.h

Index: chrome/browser/notifications/balloon_collection_impl.h
diff --git a/chrome/browser/notifications/balloon_collection_impl.h b/chrome/browser/notifications/balloon_collection_impl.h
index 00e23f2de093066cda2fe912b995358a77db063a..3ab9600f67bcd97fa00b2bb7f163fed4c8b84768 100644
--- a/chrome/browser/notifications/balloon_collection_impl.h
+++ b/chrome/browser/notifications/balloon_collection_impl.h
@@ -51,10 +51,6 @@ class BalloonCollectionImpl : public BalloonCollection,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
-  // MessageLoopForUI::Observer interface.
-  virtual void WillProcessEvent(GdkEvent* event) OVERRIDE;
-  virtual void DidProcessEvent(GdkEvent* event) OVERRIDE;
-
   // base_ is embedded, so this is a simple accessor for the number of
   // balloons in the collection.
   int count() const { return base_.count(); }