Purge browser cache for dom storage in a smarter way

content/browser/dom_storage/dom_storage_host.cc

Index: content/browser/dom_storage/dom_storage_host.cc
diff --git a/content/browser/dom_storage/dom_storage_host.cc b/content/browser/dom_storage/dom_storage_host.cc
index 3db7d5a15ec774e21de3ed46a77a109b981beed7..bba4460ce17788c84081f4eb9c75c96808bac411 100644
--- a/content/browser/dom_storage/dom_storage_host.cc
+++ b/content/browser/dom_storage/dom_storage_host.cc
@@ -7,7 +7,6 @@
 #include "content/browser/dom_storage/dom_storage_area.h"
 #include "content/browser/dom_storage/dom_storage_context_impl.h"
 #include "content/browser/dom_storage/dom_storage_namespace.h"
-#include "content/common/dom_storage/dom_storage_types.h"
 #include "url/gurl.h"
 
 namespace content {
@@ -55,11 +54,7 @@ bool DOMStorageHost::ExtractAreaValues(
   if (!area->IsLoadedInMemory()) {
     DOMStorageNamespace* ns = GetNamespace(connection_id);
     DCHECK(ns);
-    if (ns->CountInMemoryAreas() > kMaxInMemoryStorageAreas) {
-      ns->PurgeMemory(DOMStorageNamespace::PURGE_UNOPENED);
-      if (ns->CountInMemoryAreas() > kMaxInMemoryStorageAreas)
-        ns->PurgeMemory(DOMStorageNamespace::PURGE_AGGRESSIVE);
-    }
+    context_->PurgeMemory(DOMStorageContextImpl::PURGE_IF_NEEDED);
   }
   area->ExtractValues(map);
   return true;