Revert of Implement Aura side of unified touch text selection for contents

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 2eb04a40cfd7c5bb768db8c5cc6880d47a78572f..4a75f4ff8a44122c554d06faaaf4e9342b16c185 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -59,16 +59,13 @@
   WebRuntimeFeatures::enableOrientationEvent(true);
   WebRuntimeFeatures::enableFastMobileScrolling(true);
   WebRuntimeFeatures::enableMediaCapture(true);
+  WebRuntimeFeatures::enableCompositedSelectionUpdate(true);
   // Android won't be able to reliably support non-persistent notifications, the
   // intended behavior for which is in flux by itself.
   WebRuntimeFeatures::enableNotificationConstructor(false);
 #else
   WebRuntimeFeatures::enableNavigatorContentUtils(true);
 #endif  // defined(OS_ANDROID)
-
-#if defined(OS_ANDROID) || defined(USE_AURA)
-  WebRuntimeFeatures::enableCompositedSelectionUpdate(true);
-#endif
 
 #if !(defined OS_ANDROID || defined OS_CHROMEOS || defined OS_IOS)
     // Only Android, ChromeOS, and IOS support NetInfo right now.