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

net/http/http_cache.cc

Index: net/http/http_cache.cc
===================================================================
--- net/http/http_cache.cc	(revision 155282)
+++ net/http/http_cache.cc	(working copy)
@@ -19,6 +19,7 @@
 #include "base/location.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop.h"
+#include "base/metrics/field_trial.h"
 #include "base/pickle.h"
 #include "base/stl_util.h"
 #include "base/string_number_conversions.h"
@@ -409,7 +410,7 @@
     CreateBackend(NULL, net::CompletionCallback());
   }
 
-  HttpCache::Transaction* trans = new HttpCache::Transaction(this, NULL);
+  HttpCache::Transaction* trans = new HttpCache::Transaction(this, NULL, NULL);
   MetadataWriter* writer = new MetadataWriter(trans);
 
   // The writer will self destruct when done.
@@ -444,6 +445,13 @@
   disk_cache_->OnExternalCacheHit(key);
 }
 
+void HttpCache::InitializeInfiniteCache(const FilePath& path) {
+  if (base::FieldTrialList::FindFullName("InfiniteCache") != "Yes")
+    return;
+  // To be enabled after everything is fully wired.
+  // infinite_cache_.Init(path);
+}
+
 int HttpCache::CreateTransaction(scoped_ptr<HttpTransaction>* trans,
                                  HttpTransactionDelegate* delegate) {
   // Do lazy initialization of disk cache if needed.
@@ -452,7 +460,10 @@
     CreateBackend(NULL, net::CompletionCallback());
   }
 
-  trans->reset(new HttpCache::Transaction(this, delegate));
+  InfiniteCacheTransaction* infinite_cache_transaction =
+      infinite_cache_.CreateInfiniteCacheTransaction();
+  trans->reset(new HttpCache::Transaction(this, delegate,
+                                          infinite_cache_transaction));
   return OK;
 }