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..91b9d14d3991fd9e5a4fe10d1307c0879727c00a 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_infobar_delegate_win.cc",
+    "desktop_search_infobar_delegate_win.h",
+    "desktop_search_utils_win.cc",
+    "desktop_search_utils_win.h",
     "keyword_table.cc",
     "keyword_table.h",
     "keyword_web_data_service.cc",
@@ -93,6 +95,10 @@ static_library("search_engines") {
       "//components/policy:policy_component",
     ]
   }
+
+  if (is_win) {
+    deps += [ "//components/infobars/core" ]
+  }
 }
 
 source_set("test_support") {
@@ -116,7 +122,8 @@ source_set("unit_tests") {
   sources = [
     "default_search_manager_unittest.cc",
     "default_search_pref_migration_unittest.cc",
-    "desktop_search_win_unittest.cc",
+    "desktop_search_infobar_delegate_win_unittest.cc",
+    "desktop_search_utils_win_unittest.cc",
     "keyword_table_unittest.cc",
     "search_engine_data_type_controller_unittest.cc",
     "search_host_to_urls_map_unittest.cc",
@@ -140,6 +147,14 @@ source_set("unit_tests") {
     "//url",
   ]
 
+  if (is_win) {
+    deps += [
+      "//base:prefs",
+      "//components/infobars/core",
+      "//components/syncable_prefs:test_support",
+    ]
+  }
+
   if (enable_configuration_policy) {
     sources += [ "default_search_policy_handler_unittest.cc" ]