DOMStorageContextImpl that's implemented in terms of the new dom_storage classes.

webkit/dom_storage/dom_storage_context.cc

Index: webkit/dom_storage/dom_storage_context.cc
===================================================================
--- webkit/dom_storage/dom_storage_context.cc	(revision 127221)
+++ webkit/dom_storage/dom_storage_context.cc	(working copy)
@@ -19,7 +19,8 @@
     quota::SpecialStoragePolicy* special_storage_policy,
     DomStorageTaskRunner* task_runner)
     : directory_(directory),
-      task_runner_(task_runner) {
+      task_runner_(task_runner),
+      special_storage_policy_(special_storage_policy) {
   // AtomicSequenceNum starts at 0 but we want to start session
   // namespace ids at one since zero is reserved for the
   // kLocalStorageNamespaceId.
@@ -44,6 +45,21 @@
   return found->second;
 }
 
+void DomStorageContext::GetUsageInfo(std::vector<UsageInfo>* info) {
+}
+
+void DomStorageContext::DeleteOrigin(const GURL& origin) {
+}
+
+void DomStorageContext::DeleteDataModifiedSince(const base::Time& cutoff) {
+}
+
+void DomStorageContext::PurgeMemory() {
+}
+
+void DomStorageContext::Shutdown() {
+}
+
 void DomStorageContext::AddEventObserver(EventObserver* observer) {
   event_observers_.AddObserver(observer);
 }