[Ozone-DRI] Reuse framebuffer when re-enabling CRTC

ui/ozone/platform/dri/test/mock_dri_wrapper.cc

Index: ui/ozone/platform/dri/test/mock_dri_wrapper.cc
diff --git a/ui/ozone/platform/dri/test/mock_dri_wrapper.cc b/ui/ozone/platform/dri/test/mock_dri_wrapper.cc
index 6e88c6ab9eba8877ba88fb777c198d7e4073193f..7acf06ab2060a5cf2626a13ace7014369cd36f86 100644
--- a/ui/ozone/platform/dri/test/mock_dri_wrapper.cc
+++ b/ui/ozone/platform/dri/test/mock_dri_wrapper.cc
@@ -105,6 +105,11 @@ bool MockDriWrapper::SetCrtc(drmModeCrtc* crtc,
   return true;
 }
 
+bool MockDriWrapper::DisableCrtc(uint32_t crtc_id) {
+  current_framebuffer_ = 0;
+  return true;
+}
+
 ScopedDrmConnectorPtr MockDriWrapper::GetConnector(uint32_t connector_id) {
   return ScopedDrmConnectorPtr(DrmAllocator<drmModeConnector>());
 }