Get 'gn_all' building on iOS

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 e2fa0e45cc185914d14d6a080e982dc3b1dedb87..23bec1c3894e059e2004da7955543e4f3914d135 100644
--- a/components/search_engines/BUILD.gn
+++ b/components/search_engines/BUILD.gn
@@ -66,7 +66,6 @@ static_library("search_engines") {
     # omnibox/browser target, but should ideally be fixed, then this
     # dependency added:
     #"//components/omnibox/browser",
-    "//components/policy:policy_component",
     "//components/pref_registry",
     "//components/rappor",
     "//components/strings",
@@ -89,7 +88,10 @@ static_library("search_engines") {
       "default_search_policy_handler.cc",
       "default_search_policy_handler.h",
     ]
-    deps += [ "//components/policy" ]
+    deps += [
+      "//components/policy",
+      "//components/policy:policy_component",
+    ]
   }
 }
 
@@ -121,17 +123,12 @@ source_set("unit_tests") {
     "template_url_service_util_unittest.cc",
     "template_url_unittest.cc",
   ]
-  if (enable_configuration_policy) {
-    sources += [ "default_search_policy_handler_unittest.cc" ]
-  }
 
   deps = [
     ":prepopulated_engines",
     ":test_support",
     "//base",
     "//components/google/core/browser",
-    "//components/policy",
-    "//components/policy:policy_component_test_support",
     "//components/pref_registry:test_support",
     "//components/webdata/common",
     "//sql",
@@ -139,6 +136,15 @@ source_set("unit_tests") {
     "//testing/gtest",
     "//url",
   ]
+
+  if (enable_configuration_policy) {
+    sources += [ "default_search_policy_handler_unittest.cc" ]
+
+    deps += [
+      "//components/policy",
+      "//components/policy:policy_component_test_support",
+    ]
+  }
 }
 
 json_to_struct("prepopulated_engines") {