Avoid parsing the webstore base url so much.

chrome/browser/extensions/api/inline_install_private/inline_install_private_apitest.cc

 // Copyright 2014 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 "base/command_line.h"
 #include "chrome/browser/extensions/api/inline_install_private/inline_install_private_api.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/webstore_installer_test.h"
 #include "extensions/test/extension_test_message_listener.h"
 
@@ skipping 22 matching lines @@
     ready_listener.Reply(testName);
     ASSERT_TRUE(success_listener.WaitUntilSatisfied());
   }
 };
 
 class InlineInstallPrivateApiTestApp :
       public InlineInstallPrivateApiTestBase {
  public:
   InlineInstallPrivateApiTestApp() :
       InlineInstallPrivateApiTestBase(
-          "extensions/api_test/inline_install_private/",
+          "extensions/api_test/inline_install_private",
           "app.crx") {}
 };
 
 IN_PROC_BROWSER_TEST_F(InlineInstallPrivateApiTestApp, SuccessfulInstall) {
   ExtensionFunction::ScopedUserGestureForTests gesture;
   Run("successfulInstall");
 }
 
 IN_PROC_BROWSER_TEST_F(InlineInstallPrivateApiTestApp, BackgroundInstall) {
   ExtensionFunction::ScopedUserGestureForTests gesture;
@@ skipping 12 matching lines @@
           "extensions/api_test/webstore_inline_install",
           "extension.crx") {}
 };
 
 IN_PROC_BROWSER_TEST_F(InlineInstallPrivateApiTestExtension, OnlyApps) {
   ExtensionFunction::ScopedUserGestureForTests gesture;
   Run("onlyApps");
 }
 
 }  // namespace extensions