[NetInfo] Browser changes to support connection.downlinkMax

Patch 1) https://crrev.com/1308943005
Patch 2) https://crrev.com/1306423004 (this)
Patch 3) https://crrev.com/1309903006

Also depends on https://codereview.chromium.org/1306653003/

BUG=412741

Review URL: https://codereview.chromium.org/1306423004

Cr-Commit-Position: refs/heads/master@{#349739}
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index b09df57..3b99b4e 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -460,7 +460,9 @@
 #if defined(ENABLE_PLUGINS)
   void OnPurgePluginListCache(bool reload_pages);
 #endif
-  void OnNetworkTypeChanged(net::NetworkChangeNotifier::ConnectionType type);
+  void OnNetworkConnectionChanged(
+      net::NetworkChangeNotifier::ConnectionType type,
+      double max_bandwidth_mbps);
   void OnGetAccessibilityTree();
   void OnUpdateTimezone(const std::string& zoneId);
   void OnMemoryPressure(