Create FakeProviders for NativeAppMetadata and NativeAppManager

ios/public/provider/chrome/browser/BUILD.gn

Index: ios/public/provider/chrome/browser/BUILD.gn
diff --git a/ios/public/provider/chrome/browser/BUILD.gn b/ios/public/provider/chrome/browser/BUILD.gn
index 2f90f85cc3297f5e9f634d7303f58179de178f09..9d8a5f5b9ec5457735f3cd49db7876b156235424 100644
--- a/ios/public/provider/chrome/browser/BUILD.gn
+++ b/ios/public/provider/chrome/browser/BUILD.gn
@@ -16,6 +16,10 @@ source_set("browser") {
     "images/branded_image_provider.h",
     "images/branded_image_provider.mm",
     "images/whats_new_icon.h",
+    "native_app_launcher/fake_native_app_metadata.h",

[rohitrao (ping after 24h), 2016/11/25 00:34:38]

These should move down into the "test_support" target.  That will help ensure we
never accidentally ship them with the main app.

[sdefresne, 2016/11/25 08:41:57]

+1

[sczs1, 2016/11/26 04:10:18]

Right, didn't think of that! 
I've now created a new build.gn for native_app_launcher and enabled ARC on both
source_sets.

+    "native_app_launcher/fake_native_app_metadata.mm",
+    "native_app_launcher/fake_native_app_whitelist_manager.h",
+    "native_app_launcher/fake_native_app_whitelist_manager.mm",
     "native_app_launcher/native_app_metadata.h",
     "native_app_launcher/native_app_types.h",
     "native_app_launcher/native_app_whitelist_manager.h",