Remove runtime flag 'UnsafeES3APIs' from blink webgl

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 1cf707331344d6d379e07ed5bb288c204df23b0b..974f4f42f35119577f8147e2f437ba0d232f4cc9 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -189,9 +189,6 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
   else
     WebRuntimeFeatures::enableV8IdleTasks(true);
 
-  if (command_line.HasSwitch(switches::kEnableUnsafeES3APIs))
-    WebRuntimeFeatures::enableUnsafeES3APIs(true);
-
   if (command_line.HasSwitch(switches::kEnableWebVR))
     WebRuntimeFeatures::enableWebVR(true);