Revert of Un-nest configs in GN files.

sdch/BUILD.gn

Index: sdch/BUILD.gn
diff --git a/sdch/BUILD.gn b/sdch/BUILD.gn
index 4c6c5205cb067f0b953c42e4b6c6a24b46795c2f..6121dfc25b30621f107e10720e934ce5e78a3f2a 100644
--- a/sdch/BUILD.gn
+++ b/sdch/BUILD.gn
@@ -4,17 +4,6 @@
 
 config("sdch_config") {
   include_dirs = [ "open-vcdiff/src" ]
-}
-
-# gn orders flags on a target before flags from configs. The default config
-# adds -Wall, and these flags have to be after -Wall -- so they need to come
-# from a config and can't be on the target directly.
-config("sdch_warnings") {
-  cflags = []
-  if (is_linux) {
-    # TODO(mostynb): remove this if open-vcdiff is ever updated for c++11:
-    cflags += [ "-Wno-deprecated-declarations" ]
-  }
 }
 
 static_library("sdch") {
@@ -53,13 +42,24 @@
     "open-vcdiff/vsprojects/stdint.h",
   ]
 
-  configs += [ ":sdch_warnings" ]
   public_configs = [ ":sdch_config" ]
 
   deps = [
     "//base",
     "//third_party/zlib",
   ]
+
+  # gn orders flags on a target before flags from configs. The default config
+  # adds -Wall, and these flags have to be after -Wall -- so they need to come
+  # from a config and can't be on the target directly.
+  config("sdch_warnings") {
+    cflags = []
+    if (is_linux) {
+      # TODO(mostynb): remove this if open-vcdiff is ever updated for c++11:
+      cflags += [ "-Wno-deprecated-declarations" ]
+    }
+  }
+  configs += [ ":sdch_warnings" ]
 
   if (is_linux || is_android) {
     include_dirs = [ "linux" ]