Eliminate a timed wait from ExportedObject::HandleMessage().

dbus/bus.h

 // 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.
 
 #ifndef DBUS_BUS_H_
 #define DBUS_BUS_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 365 matching lines @@
 
   // Check whether the current thread is on the origin thread (the thread
   // that created the bus). If not, DCHECK will fail.
   virtual void AssertOnOriginThread();
 
   // Check whether the current thread is on the D-Bus thread. If not,
   // DCHECK will fail. If the D-Bus thread is not supplied, it calls
   // AssertOnOriginThread().
   virtual void AssertOnDBusThread();
 
+  // Returns true if the bus is connected to D-Bus.
+  bool is_connected() { return connection_ != NULL; }
+
  protected:
   // This is protected, so we can define sub classes.
   virtual ~Bus();
 
  private:
   friend class base::RefCountedThreadSafe<Bus>;
 
   // Helper function used for ShutdownOnDBusThreadAndBlock().
   void ShutdownOnDBusThreadAndBlockInternal();
 
@@ skipping 75 matching lines @@
   // OnAddTimeout()/OnRemoveTimeou() are balanced.
   int num_pending_watches_;
   int num_pending_timeouts_;
 
   DISALLOW_COPY_AND_ASSIGN(Bus);
 };
 
 }  // namespace dbus
 
 #endif  // DBUS_BUS_H_