Add undeclared virtual destructors part 2...

chrome/installer/util/html_dialog.h

Index: chrome/installer/util/html_dialog.h
===================================================================
--- chrome/installer/util/html_dialog.h	(revision 53376)
+++ chrome/installer/util/html_dialog.h	(working copy)
@@ -38,8 +38,13 @@
     // The native window has been created and is about to be visible. Use it
     // to customize the native |window| appearance.
     virtual void OnBeforeDisplay(void* window) = 0;
+
+    protected:
+     virtual ~CustomizationCallback() {}
   };
 
+  virtual ~HTMLDialog() {}
+
   // Shows the HTML in a modal dialog. The buttons and other UI are also done
   // in HTML so each native implementation needs to map the user action into
   // one of the 6 possible results of DialogResult. Important, call this
@@ -50,7 +55,6 @@
   // If the result of ShowModal() was EXTRA, the information is available
   // as a string using this method.
   virtual std::wstring GetExtraResult() = 0;
-
 };
 
 // Factory method for the native HTML Dialog. When done with the object use