[GCM] Add ConnectionListener support, and hook up to debug page

google_apis/gcm/engine/fake_connection_factory.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "google_apis/gcm/engine/fake_connection_factory.h"
 
 #include "google_apis/gcm/engine/fake_connection_handler.h"
 #include "google_apis/gcm/protocol/mcs.pb.h"
 #include "net/socket/stream_socket.h"
 
@@ skipping 23 matching lines @@
 void FakeConnectionFactory::Connect() {
   mcs_proto::LoginRequest login_request;
   request_builder_.Run(&login_request);
   connection_handler_->Init(login_request, NULL);
 }
 
 bool FakeConnectionFactory::IsEndpointReachable() const {
   return connection_handler_.get() && connection_handler_->CanSendMessage();
 }
 
+std::string FakeConnectionFactory::GetConnectionStateString() const {
+  return "";
+}
+
 base::TimeTicks FakeConnectionFactory::NextRetryAttempt() const {
   return base::TimeTicks();
 }
 
 void FakeConnectionFactory::SignalConnectionReset(
     ConnectionResetReason reason) {
   if (!delay_reconnect_)
     Connect();
   else
     reconnect_pending_ = true;
 }
 
+void FakeConnectionFactory::SetConnectionListener(
+    ConnectionListener* listener) {
+}
+
 }  // namespace gcm