Add the ability for DevTools to wrap network transactions.

chrome/browser/profiles/profile_impl_io_data.cc

Index: chrome/browser/profiles/profile_impl_io_data.cc
diff --git a/chrome/browser/profiles/profile_impl_io_data.cc b/chrome/browser/profiles/profile_impl_io_data.cc
index 4011cf309b69a1ef3193f46b621bfec954c6d173..fc463bc8de079c7199efb1cfbf267e146b39473d 100644
--- a/chrome/browser/profiles/profile_impl_io_data.cc
+++ b/chrome/browser/profiles/profile_impl_io_data.cc
@@ -449,10 +449,8 @@ void ProfileImplIOData::InitializeInternal(
           lazy_params_->cache_max_size,
           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::CACHE)
               .get());
-  net::HttpNetworkSession::Params network_session_params;
-  PopulateNetworkSessionParams(profile_params, &network_session_params);
-  net::HttpCache* main_cache = new net::HttpCache(
-      network_session_params, main_backend);
+  scoped_ptr<net::HttpCache> main_cache = CreateMainHttpFactory(
+      profile_params, main_backend);
   main_cache->InitializeInfiniteCache(lazy_params_->infinite_cache_path);
 
 #if defined(OS_ANDROID) || defined(OS_IOS)
@@ -466,8 +464,8 @@ void ProfileImplIOData::InitializeInternal(
         net::HttpCache::RECORD : net::HttpCache::PLAYBACK);
   }
 
-  main_http_factory_.reset(main_cache);
-  main_context->set_http_transaction_factory(main_cache);
+  main_http_factory_ = main_cache.PassAs<net::HttpTransactionFactory>();
+  main_context->set_http_transaction_factory(main_http_factory_.get());
 
 #if !defined(DISABLE_FTP_SUPPORT)
   ftp_factory_.reset(