Implement OnGetNetworks for net.mojom

components/arc/arc_service_manager.h

Index: components/arc/arc_service_manager.h
diff --git a/components/arc/arc_service_manager.h b/components/arc/arc_service_manager.h
index 75686d078fd6ecf3db1d7694662cdd3bcb172dfc..db3a3bc0a0dba8847f17ebd952bea9cd93b90763 100644
--- a/components/arc/arc_service_manager.h
+++ b/components/arc/arc_service_manager.h
@@ -8,6 +8,7 @@
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread_checker.h"
+#include "components/arc/common/net.mojom.h"
 
 namespace arc {
 
@@ -15,6 +16,7 @@ class ArcAuthService;
 class ArcBridgeService;
 class ArcClipboardBridge;
 class ArcInputBridge;
+class ArcNetHostImpl;
 class ArcSettingsBridge;
 class ArcPowerBridge;
 
@@ -42,6 +44,7 @@ class ArcServiceManager {
   scoped_ptr<ArcAuthService> arc_auth_service_;
   scoped_ptr<ArcClipboardBridge> arc_clipboard_bridge_;
   scoped_ptr<ArcInputBridge> arc_input_bridge_;
+  scoped_ptr<arc::NetHost> arc_net_host_;

[abhishekbh, 2016/01/12 22:42:26]

should this be ArcNetHostImpl ?

[Kevin Cernekee, 2016/01/12 23:53:27]

Per lhchavez we were able to bypass some of the indirection layers that the
other calls are using, because we don't have to call into certain parts of
Chrome.

(Sorry but I'm a little sketchy on the details - Luis could provide a much
better explanation than I can.)

[Luis Héctor Chávez, 2016/01/12 23:57:20]

Some of the other services require to use this indirection since they are
instantiated elsewhere (typically in ChromeBrowserMain), but the ownership is
then transferred to the ArcServiceManager. The reason they are instantiated
there is that they depend on directories that code in components/arc/ is now
allowed to depend on (like chrome/ or content/). The current net implementation
does not fall into that category IIUC, so we should be able to use the concrete
class here.

[hidehiko, 2016/01/13 05:58:56]

nit: here in arc:: namespace.

   scoped_ptr<ArcSettingsBridge> arc_settings_bridge_;
   scoped_ptr<ArcPowerBridge> arc_power_bridge_;