Revert "Fix a ton of compiler warnings."

chrome/browser/icon_loader.h

Index: chrome/browser/icon_loader.h
diff --git a/chrome/browser/icon_loader.h b/chrome/browser/icon_loader.h
index 30788ad00a98e42c11f62895b6c073cad11fef4c..af4a10a6897a763abaaf9db621cd3488832718d5 100644
--- a/chrome/browser/icon_loader.h
+++ b/chrome/browser/icon_loader.h
@@ -43,8 +43,6 @@ class IconLoader : public base::RefCountedThreadSafe<IconLoader> {
     // icon has been successfully loaded, result is non-null. This method must
     // return true if it is taking ownership of the returned bitmap.
     virtual bool OnBitmapLoaded(IconLoader* source, SkBitmap* result) = 0;
-   protected:
-    ~Delegate() {}
   };
 
   IconLoader(const IconGroupID& group, IconSize size, Delegate* delegate);