Add a UI test for "Encoding" menu

chrome/test/ui/ui_test.h

 // Copyright (c) 2006-2008 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 CHROME_TEST_UI_UI_TEST_H_
 #define CHROME_TEST_UI_UI_TEST_H_
 
 // This file provides a common base for running UI unit tests, which operate
 // the entire browser application in a separate process for holistic
 // functional testing.
@@ skipping 313 matching lines @@
 
   // Returns a copy of local state preferences. The caller is responsible for
   // deleting the returned object. Returns NULL if there is an error.
   DictionaryValue* GetLocalState();
 
   // Returns a copy of the default profile preferences. The caller is
   // responsible for deleting the returned object. Returns NULL if there is an
   // error.
   DictionaryValue* GetDefaultProfilePreferences();
 
+  // Generate the file path for testing a particular test.
+  // The file for the tests is all located in
+  // test_root_directory\test_directory\<testcase>
+  static std::wstring GetTestFilePath(const std::wstring& test_directory,
+                                      const std::wstring &test_case);
+
   // Generate the URL for testing a particular test.
   // HTML for the tests is all located in
   // test_root_directory\test_directory\<testcase>
   static GURL GetTestUrl(const std::wstring& test_directory,
                          const std::wstring &test_case);
 
   // Waits for the test case to finish.
   // ASSERTS if there are test failures.
   void WaitForFinish(const std::string &name,
                      const std::string &id, const GURL &url,
                      const std::string& test_complete_cookie,
                      const std::string& expected_cookie_value,
                      const int wait_time);
+
+  // Waits for a generated file ready, then check it with the original file
+  // to see whether they are equal or not. Also this function will delete the
+  // generated file if the input parameter |delete_generate_file| is true.
+  void WaitForGeneratedFileAndCheck(const std::wstring& generated_file,
+                                    const std::wstring& original_file,
+                                    bool need_equal,
+                                    bool delete_generate_file);
+
  private:
   // Check that no processes related to Chrome exist, displaying
   // the given message if any do.
   void AssertAppNotRunning(const std::wstring& error_message);
 
   // Common functionality for the public PrintResults methods.
   void PrintResultsImpl(const std::wstring& measurement,
                         const std::wstring& modifier,
                         const std::wstring& trace,
                         const std::wstring& values,
@@ skipping 101 matching lines @@
 #ifdef UNIT_TEST
 std::ostream& operator<<(std::ostream& out, const std::wstring& wstr);
 
 template<typename T>
 std::ostream& operator<<(std::ostream& out, const ::scoped_ptr<T>& ptr) {
   return out << ptr.get();
 }
 #endif  // UNIT_TEST
 
 #endif  // CHROME_TEST_UI_UI_TEST_H_