DNR Prototype: With flatbuffers

extensions/browser/guest_view/app_view/BUILD.gn

Index: extensions/browser/guest_view/app_view/BUILD.gn
diff --git a/extensions/browser/guest_view/app_view/BUILD.gn b/extensions/browser/guest_view/app_view/BUILD.gn
index 97d00d603bce47141d3a0195bcab5f83dba5cc11..4bd62011d29832afe9ec7eef7b3287d487ff563c 100644
--- a/extensions/browser/guest_view/app_view/BUILD.gn
+++ b/extensions/browser/guest_view/app_view/BUILD.gn
@@ -17,4 +17,9 @@ source_set("app_view") {
     "//extensions/common/api",
     "//extensions/strings",
   ]
+
+  # This is because app_view depends on guest_view and hence extensions/browser
+  # w/o declaring a dependency. See gn check out/Default
+  # extensions/browser/app_view will fail.
+  include_dirs = [ "//third_party/flatbuffers/src/include/" ]
 }