Add unit test and showcase support for search widget.

ios/chrome/search_widget_extension/BUILD.gn

Index: ios/chrome/search_widget_extension/BUILD.gn
diff --git a/ios/chrome/search_widget_extension/BUILD.gn b/ios/chrome/search_widget_extension/BUILD.gn
index 80a585f974b10b5e85b0f0199217989e69e6814f..7432edf5ac626a4c0f0fec6a18d67c09a5640aab 100644
--- a/ios/chrome/search_widget_extension/BUILD.gn
+++ b/ios/chrome/search_widget_extension/BUILD.gn
@@ -20,14 +20,8 @@ compile_plist("entitlements") {
 }
 
 ios_appex_bundle("search_widget_extension") {
-  sources = [
-    "search_widget_view.h",
-    "search_widget_view.mm",
-    "search_widget_view_controller.h",
-    "search_widget_view_controller.mm",
-  ]
-
   deps = [
+    ":search_widget",
     "//base",
     "//components/open_from_clipboard:open_from_clipboard_impl",
     "//components/prefs",
@@ -60,3 +54,25 @@ ios_appex_bundle("search_widget_extension") {
   entitlements_target = ":entitlements"
   info_plist_target = ":tweak_info_plist"
 }
+
+source_set("search_widget") {
+  sources = [
+    "search_widget_view.h",

[lpromero, 2017/04/13 17:26:08]

You also need to move to this source_set the deps needed for these files.

[lody, 2017/04/14 13:56:09]

Done.

+    "search_widget_view.mm",
+    "search_widget_view_controller.h",
+    "search_widget_view_controller.mm",
+  ]
+  configs += [ "//build/config/compiler:enable_arc" ]
+}
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "search_widget_view_controller_unittest.mm",
+  ]
+  deps = [
+    ":search_widget",
+    "//testing/gtest",
+  ]
+  configs += [ "//build/config/compiler:enable_arc" ]
+}