gn: Make grit() default to requiring qualified #includes.

chromecast/app/BUILD.gn

Index: chromecast/app/BUILD.gn
diff --git a/chromecast/app/BUILD.gn b/chromecast/app/BUILD.gn
index 55c82872acf7249b9aac59cafb5f60295085629a..1cceb9a3f01acd4e9d96e4967ff68d20518a1596 100644
--- a/chromecast/app/BUILD.gn
+++ b/chromecast/app/BUILD.gn
@@ -106,8 +106,12 @@ grit("chromecast_settings") {
   source = "//chromecast/app/resources/chromecast_settings.grd"
   resource_ids = "//chromecast/app/resources/resource_ids"
 
-  # TODO(thakis): Consider removing this in favor of the default directory.
+  # TODO(thakis): Consider removing output_dir in favor of the default
+  # directory, then it becomes possible to qualify includes of
+  # grit/chromecast_settings.h and DEPS files work better too.
+  # https://crbug.com/697090
   output_dir = "$root_gen_dir/chromecast_strings"
+  use_qualified_include = false
 
   outputs = [
     "grit/chromecast_settings.h",