[cros] Don't display error notification on strange network state transitions.

chrome/browser/chromeos/cros/network_library.cc

 // Copyright (c) 2011 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 "chrome/browser/chromeos/cros/network_library.h"
 
 #include <algorithm>
 #include <map>
 #include <set>
 
@@ skipping 197 matching lines @@
 }
 
 Network::~Network() {}
 
 void Network::SetState(ConnectionState new_state) {
   if (new_state == state_)
     return;
   ConnectionState old_state = state_;
   state_ = new_state;
   if (new_state == STATE_FAILURE) {
-    if (old_state != STATE_UNKNOWN) {
+    if (old_state != STATE_UNKNOWN &&
+        old_state != STATE_IDLE) {
       // New failure, the user needs to be notified.
+      // Transition STATE_IDLE -> STATE_FAILURE sometimes happens on resume
+      // but is not an actual failure as network device is not ready yet.
       notify_failure_ = true;
     }
   } else {
     if (!IsConnectingState(new_state))
       set_connection_started(false);
     // State changed, so refresh IP address.
     // Note: blocking DBus call. TODO(stevenjb): refactor this.
     InitIPAddress();
   }
   VLOG(1) << name() << ".State = " << GetStateString();
@@ skipping 4382 matching lines @@
   return network_library;
 }
 
 /////////////////////////////////////////////////////////////////////////////
 
 }  // namespace chromeos
 
 // Allows InvokeLater without adding refcounting. This class is a Singleton and
 // won't be deleted until its last InvokeLater is run.
 DISABLE_RUNNABLE_METHOD_REFCOUNT(chromeos::NetworkLibraryImplBase);