Remove Clone() from CannedBrowsingData*Helper classes

chrome/browser/browsing_data/browsing_data_appcache_helper.h

Index: chrome/browser/browsing_data/browsing_data_appcache_helper.h
diff --git a/chrome/browser/browsing_data/browsing_data_appcache_helper.h b/chrome/browser/browsing_data/browsing_data_appcache_helper.h
index a0ceb3d2f844ea2597151301faeee843266ebd55..55c5cb62601fd78dcd71a6f163ea1769a48ed1c5 100644
--- a/chrome/browser/browsing_data/browsing_data_appcache_helper.h
+++ b/chrome/browser/browsing_data/browsing_data_appcache_helper.h
@@ -60,11 +60,6 @@ class CannedBrowsingDataAppCacheHelper : public BrowsingDataAppCacheHelper {
  public:
   explicit CannedBrowsingDataAppCacheHelper(Profile* profile);
 
-  // Return a copy of the appcache helper. Only one consumer can use the
-  // StartFetching method at a time, so we need to create a copy of the helper
-  // every time we instantiate a cookies tree model for it.
-  CannedBrowsingDataAppCacheHelper* Clone();
-
   // Add an appcache to the set of canned caches that is returned by this
   // helper.
   void AddAppCache(const GURL& manifest_url);
@@ -88,8 +83,6 @@ class CannedBrowsingDataAppCacheHelper : public BrowsingDataAppCacheHelper {
  private:
   virtual ~CannedBrowsingDataAppCacheHelper();
 
-  Profile* profile_;
-
   DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataAppCacheHelper);
 };