[content shell] move code common to several processes to a common dir

content/shell/webkit_test_helpers.h

Index: content/shell/webkit_test_helpers.h
diff --git a/content/shell/webkit_test_helpers.h b/content/shell/webkit_test_helpers.h
deleted file mode 100644
index 08ccec8e9d2974007a1a7914bcefb6511dd7c97f..0000000000000000000000000000000000000000
--- a/content/shell/webkit_test_helpers.h
+++ /dev/null
@@ -1,40 +0,0 @@
-// 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_WEBKIT_TEST_HELPERS_H_
-#define CONTENT_SHELL_WEBKIT_TEST_HELPERS_H_
-
-struct WebPreferences;
-
-namespace WebTestRunner {
-struct WebPreferences;
-}
-
-namespace base {
-class FilePath;
-}
-
-struct WebPreferences;
-
-namespace content {
-
-// The TestRunner library keeps its settings in a WebTestRunner::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 WebTestRunner::WebPreferences& 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 the root of the chromium checkout.
-base::FilePath GetChromiumRootDirFilePath();
-
-}  // namespace content
-
-#endif  // CONTENT_SHELL_WEBKIT_TEST_HELPERS_H_