Get ClientCertStore through ResourceContext.

content/browser/resource_context_impl.cc

Index: content/browser/resource_context_impl.cc
diff --git a/content/browser/resource_context_impl.cc b/content/browser/resource_context_impl.cc
index 448015888f082d4015139823cdce77149ad8f205..fec11c61bc4ef9a7606d9c2550cbfac31ef4290f 100644
--- a/content/browser/resource_context_impl.cc
+++ b/content/browser/resource_context_impl.cc
@@ -13,6 +13,7 @@
 #include "content/browser/webui/url_data_manager_backend.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
+#include "net/ssl/client_cert_store.h"
 
 using base::UserDataAdapter;
 
@@ -54,6 +55,10 @@ ResourceContext::~ResourceContext() {
   DetachUserDataThread();
 }
 
+scoped_ptr<net::ClientCertStore> ResourceContext::GetClientCertStore() {
+  return scoped_ptr<net::ClientCertStore>();
+}
+
 ChromeBlobStorageContext* GetChromeBlobStorageContextForResourceContext(
     ResourceContext* resource_context) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));