Clear disk cache when the cache is not initialized

chrome/browser/browsing_data_remover.cc

Index: chrome/browser/browsing_data_remover.cc
diff --git a/chrome/browser/browsing_data_remover.cc b/chrome/browser/browsing_data_remover.cc
index 0a646fa563cb9ea6a8ec010213417adbe8537dfe..4477ce7137adabe5302ff6241989d77de092f6bb 100644
--- a/chrome/browser/browsing_data_remover.cc
+++ b/chrome/browser/browsing_data_remover.cc
@@ -240,10 +240,9 @@ void BrowsingDataRemover::ClearCacheOnIOThread(
   // Get a pointer to the cache.
   net::HttpTransactionFactory* factory =
       main_context_getter->GetURLRequestContext()->http_transaction_factory();
-  disk_cache::Backend* cache = factory->GetCache()->disk_cache();
+  disk_cache::Backend* cache = factory->GetCache()->GetBackend();
 
-  // |cache| can be null since it is lazily initialized, in this case we do
-  // nothing.
+  // |cache| can be null if it cannot be initialized.
   if (cache) {
     if (delete_begin.is_null())
       cache->DoomAllEntries();
@@ -254,10 +253,9 @@ void BrowsingDataRemover::ClearCacheOnIOThread(
   // Get a pointer to the media cache.
   factory = media_context_getter->GetURLRequestContext()->
       http_transaction_factory();
-  cache = factory->GetCache()->disk_cache();
+  cache = factory->GetCache()->GetBackend();
 
-  // |cache| can be null since it is lazily initialized, in this case we do
-  // nothing.
+  // |cache| can be null if it cannot be initialized.
   if (cache) {
     if (delete_begin.is_null())
       cache->DoomAllEntries();