Allow dbus clients to silence logging when a service is unavailable.

dbus/bus.cc

Index: dbus/bus.cc
diff --git a/dbus/bus.cc b/dbus/bus.cc
index d0662171f2460cf0aa2bf3f51596239ae47a7b3c..5df3bb78f99412da52a309a5bc2d91404e669dca 100644
--- a/dbus/bus.cc
+++ b/dbus/bus.cc
@@ -218,7 +218,27 @@ ObjectProxy* Bus::GetObjectProxy(const std::string& service_name,
   }
 
   scoped_refptr<ObjectProxy> object_proxy =
-      new ObjectProxy(this, service_name, object_path);
+      new ObjectProxy(this, service_name, object_path,
+                      ObjectProxy::LOG_SERVICE_UNKNOWN_ERRORS);
+  object_proxy_table_[key] = object_proxy;
+
+  return object_proxy.get();
+}
+
+ObjectProxy* Bus::GetObjectProxyIgnoreUnknownService(
+    const std::string& service_name, const std::string& object_path) {
+  AssertOnOriginThread();
+
+  // Check if we already have the requested object proxy.
+  const std::string key = service_name + object_path + "IGNORE_SERVICE_UNKNOWN";
+  ObjectProxyTable::iterator iter = object_proxy_table_.find(key);
+  if (iter != object_proxy_table_.end()) {
+    return iter->second;
+  }
+
+  scoped_refptr<ObjectProxy> object_proxy =
+      new ObjectProxy(this, service_name, object_path,
+                      ObjectProxy::IGNORE_SERVICE_UNKNOWN_ERRORS);
   object_proxy_table_[key] = object_proxy;
 
   return object_proxy.get();