NetInfo network quality extension: Add callbacks and Layout tests

third_party/WebKit/LayoutTests/netinfo/resources/netinfo_common.js

Index: third_party/WebKit/LayoutTests/netinfo/resources/netinfo_common.js
diff --git a/third_party/WebKit/LayoutTests/netinfo/resources/netinfo_common.js b/third_party/WebKit/LayoutTests/netinfo/resources/netinfo_common.js
index c47ad46b6382eeed77e2ba2a0ff34c0b1812bdc8..07273363e90e91186c41471dbe2b8b3fe1e0ae27 100644
--- a/third_party/WebKit/LayoutTests/netinfo/resources/netinfo_common.js
+++ b/third_party/WebKit/LayoutTests/netinfo/resources/netinfo_common.js
@@ -5,10 +5,17 @@ var initialType = "bluetooth";
 var initialDownlinkMax = 1.0;
 var newConnectionType = "ethernet";
 var newDownlinkMax = 2.0;
+var initialEffectiveType = "3g";
+var initialRtt = 25.0;
+var initialDownlink = 10.0;
+var newEffectiveType = "4g";
+var newRtt = 50.0;
+var newDownlink = 30.0;
 
 // Suppress connection messages information from the host.
 if (window.internals) {
     internals.setNetworkConnectionInfoOverride(true, initialType, initialDownlinkMax);
+    internals.setNetworkQualityInfoOverride(initialEffectiveType, initialRtt, initialDownlink);
 
     // Reset the state of the singleton network state notifier.
     window.addEventListener('beforeunload', function() {