Add a feature flag for enabling rendering pipeline throttling

third_party/WebKit/Source/web/WebRuntimeFeatures.cpp

Index: third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
diff --git a/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp b/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
index 1af0780d43dd7cc95c3ddf418dc5c0531e523f50..45b9f682f90e244e5001539d9feee2aaa860d74b 100644
--- a/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
+++ b/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
@@ -295,6 +295,11 @@ void WebRuntimeFeatures::enableWebFontsInterventionTrigger(bool enable)
     RuntimeEnabledFeatures::setWebFontsInterventionTriggerEnabled(enable);
 }
 
+void WebRuntimeFeatures::enableRenderingPipelineThrottling(bool enable)
+{
+    RuntimeEnabledFeatures::setRenderingPipelineThrottlingEnabled(enable);
+}
+
 void WebRuntimeFeatures::enableScrollAnchoring(bool enable)
 {
     RuntimeEnabledFeatures::setScrollAnchoringEnabled(enable);