Get ClientCertStore through ResourceContext.

content/shell/browser/shell_browser_context.cc

Index: content/shell/browser/shell_browser_context.cc
diff --git a/content/shell/browser/shell_browser_context.cc b/content/shell/browser/shell_browser_context.cc
index c6dbb9940cb85584b8362f39e294e19edbc65a1a..d4c49007f063f2a139e3ac26d3876373250bc687 100644
--- a/content/shell/browser/shell_browser_context.cc
+++ b/content/shell/browser/shell_browser_context.cc
@@ -18,6 +18,7 @@
 #include "content/shell/browser/shell_download_manager_delegate.h"
 #include "content/shell/browser/shell_url_request_context_getter.h"
 #include "content/shell/common/shell_switches.h"
+#include "net/ssl/client_cert_store.h"
 
 #if defined(OS_WIN)
 #include "base/base_paths_win.h"
@@ -49,6 +50,9 @@ class ShellBrowserContext::ShellResourceContext : public ResourceContext {
   virtual bool AllowCameraAccess(const GURL& origin) OVERRIDE {
     return false;
   }
+  virtual scoped_ptr<net::ClientCertStore> GetClientCertStore() OVERRIDE {
+    return scoped_ptr<net::ClientCertStore>();
+  }
 
   void set_url_request_context_getter(ShellURLRequestContextGetter* getter) {
     getter_ = getter;