Make the TestServer use an absolute document root path.

net/test/remote_test_server.h

 // 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.
 
 #ifndef NET_TEST_REMOTE_TEST_SERVER_H_
 #define NET_TEST_REMOTE_TEST_SERVER_H_
 
 #include <string>
 
 #include "net/test/base_test_server.h"
 
 namespace net {
 
 class SpawnerCommunicator;
 
 // The RemoteTestServer runs an external Python-based test server in another
 // machine that is different from the machine in which RemoteTestServer runs.
 class RemoteTestServer : public BaseTestServer {
  public:
   // Initialize a TestServer listening on a specific host (IP or hostname).
-  // |document_root| must be a relative path under the root tree.
+  // |document_root| must be an absolute paht, or a relative path under the
+  // source directory.
   RemoteTestServer(Type type,
                    const std::string& host,
                    const FilePath& document_root);
 
   // Initialize a TestServer with a specific set of SSLOptions.
   // |document_root| must be a relative path under the root tree.
   RemoteTestServer(Type type,
                    const SSLOptions& ssl_options,
                    const FilePath& document_root);
 
@@ skipping 30 matching lines @@
   // the host machine.
   scoped_ptr<SpawnerCommunicator> spawner_communicator_;
 
   DISALLOW_COPY_AND_ASSIGN(RemoteTestServer);
 };
 
 }  // namespace net
 
 #endif  // NET_TEST_REMOTE_TEST_SERVER_H_