chrome: dbus: support asynchronous method replies

dbus/end_to_end_async_unittest.cc

Index: dbus/end_to_end_async_unittest.cc
diff --git a/dbus/end_to_end_async_unittest.cc b/dbus/end_to_end_async_unittest.cc
index 7ba782ba54870e186c17e3ac3e1f01c67bc76c6b..2cebbcf2681caa149fd88952e511c2ed36ff93fe 100644
--- a/dbus/end_to_end_async_unittest.cc
+++ b/dbus/end_to_end_async_unittest.cc
@@ -204,6 +204,24 @@ TEST_F(EndToEndAsyncTest, Timeout) {
   ASSERT_EQ("", response_strings_[0]);
 }
 
+// Tests calling a method that sends its reply asynchronously.
+TEST_F(EndToEndAsyncTest, AsyncEcho) {
+  const char* kHello = "hello";
+
+  // Create the method call.
+  dbus::MethodCall method_call("org.chromium.TestInterface", "AsyncEcho");
+  dbus::MessageWriter writer(&method_call);
+  writer.AppendString(kHello);
+
+  // Call the method.
+  const int timeout_ms = dbus::ObjectProxy::TIMEOUT_USE_DEFAULT;
+  CallMethod(&method_call, timeout_ms);
+
+  // Check the response.
+  WaitForResponses(1);
+  EXPECT_EQ(kHello, response_strings_[0]);
+}
+
 TEST_F(EndToEndAsyncTest, NonexistentMethod) {
   dbus::MethodCall method_call("org.chromium.TestInterface", "Nonexistent");