Create MetricsPrivateDelegate for metricsPrivate behavior

extensions/shell/browser/shell_extensions_api_client.cc

Index: extensions/shell/browser/shell_extensions_api_client.cc
diff --git a/extensions/shell/browser/shell_extensions_api_client.cc b/extensions/shell/browser/shell_extensions_api_client.cc
index 527b883ab7f4d46f60cee33764177da457e0261d..6816bc468d3e4073acc65b8cd57365c569b8ccd9 100644
--- a/extensions/shell/browser/shell_extensions_api_client.cc
+++ b/extensions/shell/browser/shell_extensions_api_client.cc
@@ -4,6 +4,8 @@
 
 #include "extensions/shell/browser/shell_extensions_api_client.h"
 
+#include "base/memory/ptr_util.h"
+#include "extensions/shell/browser/api/metrics_private/shell_metrics_private_delegate.h"
 #include "extensions/shell/browser/shell_app_view_guest_delegate.h"
 #include "extensions/shell/browser/shell_extension_web_contents_observer.h"
 
@@ -22,4 +24,9 @@ AppViewGuestDelegate* ShellExtensionsAPIClient::CreateAppViewGuestDelegate()
   return new ShellAppViewGuestDelegate();
 }
 
+std::unique_ptr<MetricsPrivateDelegate>
+ShellExtensionsAPIClient::CreateMetricsPrivateDelegate() const {
+  return base::MakeUnique<ShellMetricsPrivateDelegate>();
+}
+
 }  // namespace extensions