Condition effectiveType as RuntimeEnabled feature

third_party/WebKit/Source/modules/netinfo/NetworkInformation.idl

Index: third_party/WebKit/Source/modules/netinfo/NetworkInformation.idl
diff --git a/third_party/WebKit/Source/modules/netinfo/NetworkInformation.idl b/third_party/WebKit/Source/modules/netinfo/NetworkInformation.idl
index c47e8b9e9bb9af804c273f605bde9bd69defd146..e3f885f59469072438c3e4c01cfd28fb528b8b08 100644
--- a/third_party/WebKit/Source/modules/netinfo/NetworkInformation.idl
+++ b/third_party/WebKit/Source/modules/netinfo/NetworkInformation.idl
@@ -35,7 +35,7 @@ typedef unsigned long long Milliseconds;
     [RuntimeEnabled=NetInfoDownlinkMax, MeasureAs=NetInfoDownlinkMax] readonly attribute Megabit downlinkMax;
     [RuntimeEnabled=NetInfoDownlinkMax, MeasureAs=NetInfoOnChange] attribute EventHandler onchange;
     [MeasureAs=NetInfoOnTypeChange] attribute EventHandler ontypechange;
-    [MeasureAs=NetInfoEffectiveType] readonly attribute EffectiveConnectionType effectiveType;
+    [RuntimeEnabled=NetInfoEffectiveType, MeasureAs=NetInfoEffectiveType] readonly attribute EffectiveConnectionType effectiveType;
     [RuntimeEnabled=NetInfoRtt, MeasureAs=NetInfoRtt] readonly attribute Milliseconds rtt;  
     [RuntimeEnabled=NetInfoDownlink, MeasureAs=NetInfoDownlink] readonly attribute Megabit downlink;
 };