Implement the Windows desktop search redirection feature.

components/search_engines/BUILD.gn

Index: components/search_engines/BUILD.gn
diff --git a/components/search_engines/BUILD.gn b/components/search_engines/BUILD.gn
index 3229f4b4b4296a43956129e3116db01150f631fb..972dde46850571557d451fccb26472651f419741 100644
--- a/components/search_engines/BUILD.gn
+++ b/components/search_engines/BUILD.gn
@@ -11,8 +11,10 @@ static_library("search_engines") {
     "default_search_manager.h",
     "default_search_pref_migration.cc",
     "default_search_pref_migration.h",
-    "desktop_search_win.cc",
-    "desktop_search_win.h",
+    "desktop_search_redirection_infobar_delegate.cc",
+    "desktop_search_redirection_infobar_delegate.h",
+    "desktop_search_utils.cc",
+    "desktop_search_utils.h",
     "keyword_table.cc",
     "keyword_table.h",
     "keyword_web_data_service.cc",
@@ -66,6 +68,7 @@ static_library("search_engines") {
     # omnibox/browser target, but should ideally be fixed, then this
     # dependency added:
     #"//components/omnibox/browser",
+    "//components/infobars/core",
     "//components/pref_registry",
     "//components/rappor",
     "//components/strings",
@@ -116,7 +119,7 @@ source_set("unit_tests") {
   sources = [
     "default_search_manager_unittest.cc",
     "default_search_pref_migration_unittest.cc",
-    "desktop_search_win_unittest.cc",
+    "desktop_search_utils_unittest.cc",
     "keyword_table_unittest.cc",
     "search_engine_data_type_controller_unittest.cc",
     "search_host_to_urls_map_unittest.cc",
@@ -129,9 +132,11 @@ source_set("unit_tests") {
     ":prepopulated_engines",
     ":test_support",
     "//base",
+    "//base:prefs",
     "//components/google/core/browser",
     "//components/pref_registry:test_support",
     "//components/sync_driver:test_support",
+    "//components/syncable_prefs:test_support",
     "//components/webdata/common",
     "//sql",
     "//sync:test_support_sync_api",