Change ExecuteJavaScript* helper functions in browser_test_utils.{h,cc}

chrome/browser/extensions/api/management/management_browsertest.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 "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/memory/ref_counted.h"
 #include "base/stl_util.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_host.h"
@@ skipping 38 matching lines @@
         extensions::ExtensionSystem::Get(browser()->profile())->
             process_manager();
     extensions::ExtensionHost* ext_host =
         manager->GetBackgroundHostForExtension(extension->id());
     EXPECT_TRUE(ext_host);
     if (!ext_host)
       return false;
 
     std::string version_from_bg;
     bool exec = content::ExecuteJavaScriptAndExtractString(
-        ext_host->render_view_host(), L"", L"version()", &version_from_bg);
+        ext_host->render_view_host(), "", "version()", &version_from_bg);
     EXPECT_TRUE(exec);
     if (!exec)
       return false;
 
     if (version_from_bg != expected_version ||
         extension->VersionString() != expected_version)
       return false;
     return true;
   }
 };
@@ skipping 572 matching lines @@
         forcelist, kExtensionId, "http://localhost/autoupdate/manifest");
   }
   ASSERT_TRUE(WaitForExtensionInstall());
   ASSERT_EQ(size_before + 1, service->extensions()->size());
   extension = service->GetExtensionById(kExtensionId, false);
   ASSERT_TRUE(extension);
   EXPECT_EQ(Extension::EXTERNAL_POLICY_DOWNLOAD, extension->location());
   EXPECT_TRUE(service->IsExtensionEnabled(kExtensionId));
   EXPECT_TRUE(service->disabled_extensions()->is_empty());
 }