chromeos: Add ArcInputBridge to components/arc

components/arc/arc_bridge_service.h

Index: components/arc/arc_bridge_service.h
diff --git a/components/arc/arc_bridge_service.h b/components/arc/arc_bridge_service.h
index 8d23d44da7cea9fe21c00f3cbb00f2113b128f52..0d3c6472b717fb907cf2f35c7c270a34cec1b7e3 100644
--- a/components/arc/arc_bridge_service.h
+++ b/components/arc/arc_bridge_service.h
@@ -18,7 +18,8 @@ namespace arc {
 // The Chrome-side service that handles ARC instances and ARC bridge creation.
 // This service handles the lifetime of ARC instances and sets up the
 // communication channel (the ARC bridge) used to send and receive messages.
-class ArcBridgeService : public IPC::Listener {
+class ArcBridgeService : public IPC::Listener,
+                         public base::SupportsWeakPtr<ArcBridgeService> {
  public:
   // The possible states of the bridge.  In the normal flow, the state changes
   // in the following sequence: