Fix testInstallExtensions by adding correct crx files.

chrome/test/webdriver/commands/create_session.cc

 // Copyright (c) 2011 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 "chrome/test/webdriver/commands/create_session.h"
 
 #include <sstream>
 #include <string>
 
 #include "base/base64.h"
@@ skipping 143 matching lines @@
     }
     for (size_t i = 0; i < extensions_list->GetSize(); ++i) {
       std::string base64_extension;
       if (!extensions_list->GetString(i, &base64_extension)) {
         response->SetError(new Error(
             kBadRequest, "Extension must be a base64 encoded string."));
         return;
       }
       FilePath extension_file(
           extensions_dir.path().AppendASCII("extension" +
-                                            base::IntToString(i)));
+                                            base::IntToString(i) + ".crx"));
       std::string message;
       if (!WriteBase64DataToFile(extension_file, base64_extension, &message)) {
         response->SetError(new Error(kBadRequest, message));
         return;
       }
       extensions.push_back(extension_file);
     }
   } else if (capabilities->HasKey(kExtensions)) {
     response->SetError(new Error(
         kBadRequest, "Extensions must be a list of base64 encoded strings"));
@@ skipping 39 matching lines @@
   // difficult, and returning the hostname causes perf problems with the python
   // bindings on Windows.
   std::ostringstream stream;
   stream << SessionManager::GetInstance()->url_base() << "/session/"
          << session->id();
   response->SetStatus(kSeeOther);
   response->SetValue(Value::CreateStringValue(stream.str()));
 }
 
 }  // namespace webdriver