Add a preference to control Windows desktop search redirection.

components/search_engines/desktop_search_win_unittest.cc

 // Copyright 2015 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 "components/search_engines/detect_desktop_search_win.h"
+#include "components/search_engines/desktop_search_win.h"
 
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "components/search_engines/testing_search_terms_data.h"
+#include "components/syncable_prefs/testing_pref_service_syncable.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
 namespace {
 struct DetectWindowsDesktopSearchTestData {
   const char* url;
   const wchar_t* expected_search_terms;
 };
 }  // namespace
 
-TEST(DetectWindowsDesktopSearch, DetectWindowsDesktopSearch) {
+TEST(WindowsDesktopSearch, Prefs) {
+  const char kWindowsDesktopSearchRedirectionPref[] =
+      "windows_desktop_search_redirection";
+
+  syncable_prefs::TestingPrefServiceSyncable prefs;
+  RegisterWindowsDesktopSearchRedirectionPref(prefs.registry());
+
+  EXPECT_EQ(WindowsDesktopSearchRedirectionPref::UNSET,
+            GetWindowsDesktopSearchRedirectionPref(&prefs));
+  prefs.SetBoolean(kWindowsDesktopSearchRedirectionPref, true);
+  EXPECT_EQ(WindowsDesktopSearchRedirectionPref::ENABLED,
+            GetWindowsDesktopSearchRedirectionPref(&prefs));
+  prefs.SetBoolean(kWindowsDesktopSearchRedirectionPref, false);
+  EXPECT_EQ(WindowsDesktopSearchRedirectionPref::DISABLED,
+            GetWindowsDesktopSearchRedirectionPref(&prefs));
+}
+
+TEST(WindowsDesktopSearch, DetectWindowsDesktopSearch) {
   const DetectWindowsDesktopSearchTestData test_data[] = {
       {"https://www.google.com", L""},
       {"https://www.bing.com/search", L""},
       {"https://www.bing.com/search?q=keyword&form=QBLH", L""},
       {"https://www.bing.com/search?q=keyword&form=WNSGPH", L"keyword"},
       {"https://www.bing.com/search?q=keyword&form=WNSBOX", L"keyword"},
       {"https://www.bing.com/search?q=keyword&FORM=WNSGPH", L"keyword"},
       {"https://www.bing.com/search?q=keyword&FORM=WNSBOX", L"keyword"},
       {"https://www.bing.com/search?form=WNSGPH&q=keyword", L"keyword"},
       {"https://www.bing.com/search?q=keyword&form=WNSGPH&other=stuff",
        L"keyword"},
       {"https://www.bing.com/search?q=%C3%A8+%C3%A9&form=WNSGPH", L"\xE8 \xE9"},
   };
 
   for (size_t i = 0; i < arraysize(test_data); ++i) {
     TestingSearchTermsData search_terms_data("https://www.google.com");
     base::string16 search_terms;
     bool is_desktop_search = DetectWindowsDesktopSearch(
         GURL(test_data[i].url), search_terms_data, &search_terms);
     const base::string16 expected_search_terms(
         test_data[i].expected_search_terms);
     EXPECT_EQ(!expected_search_terms.empty(), is_desktop_search);
     EXPECT_EQ(expected_search_terms, search_terms);
   }
 }