Http Cache: Add code for simulating an infinite HTTP cache.

net/http/http_cache_transaction.h

Index: net/http/http_cache_transaction.h
===================================================================
--- net/http/http_cache_transaction.h	(revision 155282)
+++ net/http/http_cache_transaction.h	(working copy)
@@ -57,7 +57,9 @@
     UPDATE          = READ_META | WRITE,  // READ_WRITE & ~READ_DATA
   };
 
-  Transaction(HttpCache* cache, HttpTransactionDelegate* transaction_delegate);
+  Transaction(HttpCache* cache,
+              HttpTransactionDelegate* transaction_delegate,
+              InfiniteCacheTransaction* infinite_cache_transaction);
   virtual ~Transaction();
 
   Mode mode() const { return mode_; }
@@ -372,6 +374,7 @@
   HttpCache::ActiveEntry* entry_;
   HttpCache::ActiveEntry* new_entry_;
   scoped_ptr<HttpTransaction> network_trans_;
+  scoped_ptr<InfiniteCacheTransaction> infinite_cache_transaction_;
   CompletionCallback callback_;  // Consumer's callback.
   HttpResponseInfo response_;
   HttpResponseInfo auth_response_;