[NetInfo] Add Blink support for connection.change, connection.downlinkMax, and wimax

LayoutTests/fast/dom/Window/resources/window-property-collector.js

Index: LayoutTests/fast/dom/Window/resources/window-property-collector.js
diff --git a/LayoutTests/fast/dom/Window/resources/window-property-collector.js b/LayoutTests/fast/dom/Window/resources/window-property-collector.js
index 151aa160c1ba8cf876e35d7d32f47e7b4f26f8fa..5cbd31604727f7d460aacdc363de3862d429c387 100644
--- a/LayoutTests/fast/dom/Window/resources/window-property-collector.js
+++ b/LayoutTests/fast/dom/Window/resources/window-property-collector.js
@@ -47,6 +47,8 @@ function emitExpectedResult(path, expected)
     // Connection type depends on the host, skip.
     if (propertyPath == 'navigator.connection.type')
       return;
+    if (propertyPath == 'navigator.connection.downlinkMax')
+      return;
 
     switch (propertyPath) {
     case "location.href":