Stop exposing --disable-gpu-compositing as a Blink RuntimeEnabledFeature

content/child/runtime_features.cc

Index: content/child/runtime_features.cc
diff --git a/content/child/runtime_features.cc b/content/child/runtime_features.cc
index 697892735527d2f33121963aefb802e816f7aef0..820ee745b8523aed829e54cde56c0e1f2eff16e9 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -117,12 +117,6 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
   if (command_line.HasSwitch(switches::kForceDisplayList2dCanvas))
     WebRuntimeFeatures::forceDisplayList2dCanvas(true);
 
-  if (command_line.HasSwitch(switches::kDisableGpuCompositing) ||
-      command_line.HasSwitch(switches::kDisableGpu))
-    WebRuntimeFeatures::enableGpuCompositing(false);
-  else
-    WebRuntimeFeatures::enableGpuCompositing(true);
-
   if (command_line.HasSwitch(
       switches::kEnableCanvas2dDynamicRenderingModeSwitching))
     WebRuntimeFeatures::enableCanvas2dDynamicRenderingModeSwitching(true);