RefCounted types should not have public destructors, chrome/browser/bookmarks/ edition

chrome/browser/bookmarks/bookmark_html_writer.cc

Index: chrome/browser/bookmarks/bookmark_html_writer.cc
diff --git a/chrome/browser/bookmarks/bookmark_html_writer.cc b/chrome/browser/bookmarks/bookmark_html_writer.cc
index 2e9376e1cecd7e203b3a80ee91b3400623f28add..7dfe7efbb07088ae0bafef703884c3c3bb75fabc 100644
--- a/chrome/browser/bookmarks/bookmark_html_writer.cc
+++ b/chrome/browser/bookmarks/bookmark_html_writer.cc
@@ -151,6 +151,8 @@ class Writer : public base::RefCountedThreadSafe<Writer> {
   }
 
  private:
+  friend class base::RefCountedThreadSafe<Writer>;
+
   // Types of text being written out. The type dictates how the text is
   // escaped.
   enum TextType {
@@ -162,6 +164,8 @@ class Writer : public base::RefCountedThreadSafe<Writer> {
     CONTENT
   };
 
+  ~Writer() {}
+
   // Opens the file, returning true on success.
   bool OpenFile() {
     int flags = base::PLATFORM_FILE_CREATE_ALWAYS | base::PLATFORM_FILE_WRITE;