[net] Better StopCaching() handling for HttpCache::Transaction.

net/http/http_cache.h

Index: net/http/http_cache.h
diff --git a/net/http/http_cache.h b/net/http/http_cache.h
index 026d476e92f0dcfd36c309d07c5016ddfaa04854..cdd0935863c12a03ad1cfa9d9de45aa6b093ac9f 100644
--- a/net/http/http_cache.h
+++ b/net/http/http_cache.h
@@ -347,11 +347,6 @@ class NET_EXPORT HttpCache : public HttpTransactionFactory,
   // one (in this case, the entry is no longer valid).
   int AddTransactionToEntry(ActiveEntry* entry, Transaction* trans);
 
-  // Called when the transaction has finished working with this entry. |cancel|
-  // is true if the operation was cancelled by the caller instead of running
-  // to completion.
-  void DoneWithEntry(ActiveEntry* entry, Transaction* trans, bool cancel);
-
   // Called when the transaction has finished writing to this entry. |success|
   // is false if the cache entry should be deleted.
   void DoneWritingToEntry(ActiveEntry* entry, bool success);