Change dbus check for file capability to runtime (second try)

dbus/message_unittest.cc

 // Copyright (c) 2012 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 "dbus/message.h"
 
 #include "base/basictypes.h"
 #include "base/eintr_wrapper.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 79 matching lines @@
   EXPECT_EQ(5U, uint32_value);
   EXPECT_EQ(6, int64_value);
   EXPECT_EQ(7U, uint64_value);
   EXPECT_DOUBLE_EQ(8.0, double_value);
   EXPECT_EQ("string", string_value);
   EXPECT_EQ(dbus::ObjectPath("/object/path"), object_path_value);
 }
 
 // Check all basic types can be properly written and read.
 TEST(MessageTest, AppendAndPopFileDescriptor) {
-  if (!dbus::kDBusTypeUnixFdIsSupported) {
+  if (!dbus::IsDBusTypeUnixFdSupported()) {
     LOG(WARNING) << "FD passing is not supported";
     return;
   }
 
   scoped_ptr<dbus::Response> message(dbus::Response::CreateEmpty());
   dbus::MessageWriter writer(message.get());
 
   // Append stdout.
   dbus::FileDescriptor temp(1);
   // Descriptor should not be valid until checked.
@@ skipping 510 matching lines @@
   dbus::MessageWriter writer(message.get());
   writer.AppendString(kLongString);
 
   ASSERT_EQ("message_type: MESSAGE_METHOD_RETURN\n"
             "signature: s\n\n"
             "string \"oooooooooooooooooooooooooooooooooooooooooooooooo"
             "oooooooooooooooooooooooooooooooooooooooooooooooooooo... "
             "(1000 bytes in total)\"\n",
             message->ToString());
 }