Get ClientCertStore through ResourceContext.

content/public/browser/content_browser_client.cc

Index: content/public/browser/content_browser_client.cc
diff --git a/content/public/browser/content_browser_client.cc b/content/public/browser/content_browser_client.cc
index 0a91186650aaca5e48153fdde20924dc58423af6..2f3310c03d7cea12341581fb2baceaf2d426cc5e 100644
--- a/content/public/browser/content_browser_client.cc
+++ b/content/public/browser/content_browser_client.cc
@@ -5,6 +5,7 @@
 #include "content/public/browser/content_browser_client.h"
 
 #include "base/files/file_path.h"
+#include "net/ssl/client_cert_store.h"
 #include "ui/gfx/image/image_skia.h"
 #include "url/gurl.h"
 
@@ -211,6 +212,11 @@ WebKit::WebNotificationPresenter::Permission
   return WebKit::WebNotificationPresenter::PermissionAllowed;
 }
 
+scoped_ptr<net::ClientCertStore> ContentBrowserClient::GetClientCertStore(
+    ResourceContext* context) {
+  return scoped_ptr<net::ClientCertStore>();
+}
+
 bool ContentBrowserClient::CanCreateWindow(
     const GURL& opener_url,
     const GURL& opener_top_level_frame_url,