Reland: Implement Aura side of unified touch text selection for contents

content/child/runtime_features.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/child/runtime_features.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
@@ skipping 41 matching lines @@
 
   // Android does not have support for PagePopup
   WebRuntimeFeatures::enablePagePopup(false);
   // Android does not yet support SharedWorker. crbug.com/154571
   WebRuntimeFeatures::enableSharedWorker(false);
   // Android does not yet support NavigatorContentUtils.
   WebRuntimeFeatures::enableNavigatorContentUtils(false);
   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.
     WebRuntimeFeatures::enableNetworkInformation(false);
 #endif
 
 #if defined(OS_WIN)
   // Screen Orientation API is currently broken on Windows 8 Metro mode and
   // until we can find how to disable it only for Blink instances running in a
   // renderer process in Metro, we need to disable the API altogether for Win8.
   // See http://crbug.com/400846
@@ skipping 142 matching lines @@
     base::SplitString(
         command_line.GetSwitchValueASCII(switches::kDisableBlinkFeatures), ',',
         &disabled_features);
     for (const std::string& feature : disabled_features) {
       WebRuntimeFeatures::enableFeatureFromString(feature, false);
     }
   }
 }
 
 }  // namespace content