content: Rename webkit_test_helpers.{cc,h} to blink_test_helpers.{cc,h}

content/shell/common/webkit_test_helpers.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 CONTENT_SHELL_COMMON_WEBKIT_TEST_HELPERS_H_
-#define CONTENT_SHELL_COMMON_WEBKIT_TEST_HELPERS_H_
-
-#include <string>
-#include <vector>
-
-namespace base {
-class FilePath;
-}
-
-namespace content {
-
-struct TestPreferences;
-struct WebPreferences;
-
-// The TestRunner library keeps its settings in a WebPreferenes object.
-// The content_shell, however, uses WebPreferences. This method exports the
-// settings from the WebTestRunner library which are relevant for layout tests.
-void ExportLayoutTestSpecificPreferences(const TestPreferences& from,
-                                         WebPreferences* to);
-
-// Applies settings that differ between layout tests and regular mode.
-void ApplyLayoutTestDefaultPreferences(WebPreferences* prefs);
-
-// Returns the root of the Blink checkout.
-base::FilePath GetWebKitRootDirFilePath();
-
-// Returns list of extra font files to be made accessible to the renderer.
-std::vector<std::string> GetSideloadFontFiles();
-
-}  // namespace content
-
-#endif  // CONTENT_SHELL_COMMON_WEBKIT_TEST_HELPERS_H_