Get iOS GN build working again

third_party/google_toolbox_for_mac/BUILD.gn

Index: third_party/google_toolbox_for_mac/BUILD.gn
diff --git a/third_party/google_toolbox_for_mac/BUILD.gn b/third_party/google_toolbox_for_mac/BUILD.gn
index 1977a06aa41333d7d0db022975f87c501b9fa14c..7b207b371f2e923436e5a8eab42b0475477eb92c 100644
--- a/third_party/google_toolbox_for_mac/BUILD.gn
+++ b/third_party/google_toolbox_for_mac/BUILD.gn
@@ -10,6 +10,11 @@ config("google_toolbox_for_mac_config") {
     "src/DebugUtils",
     "src/Foundation",
   ]
+
+  # TODO(crbug.com/569158): Suppresses warnings that are treated as errors
+  # when minimum iOS version support is increased to iOS 9 and up.
+  # This should be removed once all deprecation violations have been fixed.
+  cflags = [ "-Wno-deprecated-declarations" ]

[Nico, 2016/06/22 22:53:33]

so this config is a public_config below and this has disabled deprecation
warnings for all code depending on this (e.g. the chrome target).

1. Please fix this
2. How can we make it harder for people to make catastrophic mistakes like this?
Should configs listed in public_configs have to be declared via public_config(),
so that it's visible at the config site that changing it isn't some local thing?

 }
 
 component("google_toolbox_for_mac") {