Add a preference to control Windows desktop search redirection.

components/search_engines/desktop_search_win_unittest.cc

Index: components/search_engines/desktop_search_win_unittest.cc
diff --git a/components/search_engines/detect_desktop_search_win_unittest.cc b/components/search_engines/desktop_search_win_unittest.cc
similarity index 93%
copy from components/search_engines/detect_desktop_search_win_unittest.cc
copy to components/search_engines/desktop_search_win_unittest.cc
index e3477a6ef0ef1e888621e59ff8dd492dae8c9025..a49e3ef16a6006a93a57f90c3ee84af22f0bec9f 100644
--- a/components/search_engines/detect_desktop_search_win_unittest.cc
+++ b/components/search_engines/desktop_search_win_unittest.cc
@@ -2,7 +2,7 @@
 // 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"
@@ -17,7 +17,7 @@ struct DetectWindowsDesktopSearchTestData {
 };
 }  // namespace
 
-TEST(DetectWindowsDesktopSearch, DetectWindowsDesktopSearch) {
+TEST(WindowsDesktopSearch, DetectWindowsDesktopSearch) {
   const DetectWindowsDesktopSearchTestData test_data[] = {
       {"https://www.google.com", L""},
       {"https://www.bing.com/search", L""},