Create MetricsPrivateDelegate for metricsPrivate behavior

extensions/browser/api/extensions_api_client.cc

Index: extensions/browser/api/extensions_api_client.cc
diff --git a/extensions/browser/api/extensions_api_client.cc b/extensions/browser/api/extensions_api_client.cc
index a64ac0f5ca400a0c0e0fad206debddfd39bd97b9..feea569ff1f90045fc0dfd437edb1def1987092f 100644
--- a/extensions/browser/api/extensions_api_client.cc
+++ b/extensions/browser/api/extensions_api_client.cc
@@ -7,6 +7,7 @@
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "extensions/browser/api/device_permissions_prompt.h"
+#include "extensions/browser/api/metrics_private/metrics_private_delegate.h"
 #include "extensions/browser/api/virtual_keyboard_private/virtual_keyboard_delegate.h"
 #include "extensions/browser/api/web_request/web_request_event_router_delegate.h"
 #include "extensions/browser/guest_view/extensions_guest_view_manager_delegate.h"
@@ -99,4 +100,8 @@ ManagementAPIDelegate* ExtensionsAPIClient::CreateManagementAPIDelegate()
   return nullptr;
 }
 
+MetricsPrivateDelegate* ExtensionsAPIClient::GetMetricsPrivateDelegate() {
+  return nullptr;
+}
+
 }  // namespace extensions