Add command line flags to enable Web Animations CSS and SVG implementations

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 2e9c1fe9b2dfdb49af49580f690def4322fc304b..b0b77193bb60e26cd085b6e12620cee9a6c0c12f 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -96,6 +96,12 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
   if (command_line.HasSwitch(switches::kDisableLegacyEncryptedMedia))
     WebRuntimeFeatures::enableLegacyEncryptedMedia(false);
 
+  if (command_line.HasSwitch(switches::kEnableWebAnimationsCSS))
+    WebRuntimeFeatures::enableWebAnimationsCSS();
+
+  if (command_line.HasSwitch(switches::kEnableWebAnimationsSVG))
+    WebRuntimeFeatures::enableWebAnimationsSVG();
+
   if (command_line.HasSwitch(switches::kEnableWebMIDI))
     WebRuntimeFeatures::enableWebMIDI(true);