Make the TestServer use an absolute document root path.

net/test/local_test_server.cc

 // Copyright 2013 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 "net/test/local_test_server.h"
 
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/logging.h"
 #include "base/path_service.h"
@@ skipping 122 matching lines @@
     base::CloseProcessHandle(process_handle_);
     process_handle_ = base::kNullProcessHandle;
   } else {
     VLOG(1) << "Kill failed?";
   }
 
   return ret;
 }
 
 bool LocalTestServer::Init(const FilePath& document_root) {
-  if (document_root.IsAbsolute())
-    return false;
-
   // At this point, the port that the test server will listen on is unknown.
   // The test server will listen on an ephemeral port, and write the port
   // number out over a pipe that this TestServer object will read from. Once
   // that is complete, the host port pair will contain the actual port.
   DCHECK(!GetPort());
   process_handle_ = base::kNullProcessHandle;
 
   FilePath src_dir;
   if (!PathService::Get(base::DIR_SOURCE_ROOT, &src_dir))
     return false;
-  SetResourcePath(src_dir.Append(document_root),
+
+  FilePath root;
+  if (document_root.IsAbsolute())
+    root = document_root;
+  else
+    root = src_dir.Append(document_root);
+
+  SetResourcePath(root,
                   src_dir.AppendASCII("net")
                          .AppendASCII("data")
                          .AppendASCII("ssl")
                          .AppendASCII("certificates"));
   return true;
 }
 
 bool LocalTestServer::SetPythonPath() const {
   FilePath third_party_dir;
   if (!PathService::Get(base::DIR_SOURCE_ROOT, &third_party_dir)) {
@@ skipping 83 matching lines @@
       break;
     default:
       NOTREACHED();
       return false;
   }
 
   return true;
 }
 
 }  // namespace net