Revert of [GN]: BUILD file housecleaning

build/config/mac/mac_sdk.gni

Index: build/config/mac/mac_sdk.gni
diff --git a/build/config/mac/mac_sdk.gni b/build/config/mac/mac_sdk.gni
index 8767aa4108b85a10780e1795aad7e88df0a1104d..20008d47975b7cdbf5be53fd19020d469d37a3b5 100644
--- a/build/config/mac/mac_sdk.gni
+++ b/build/config/mac/mac_sdk.gni
@@ -34,5 +34,11 @@ find_sdk_lines =
     exec_script("//build/mac/find_sdk.py", find_sdk_args, "list lines")
 mac_sdk_version = find_sdk_lines[1]
 if (mac_sdk_path == "") {
+  # TODO(brettw) http://crbug.com/335325  when everybody moves to XCode 5 we
+  # can remove the --print_sdk_path argument to find_sdk and instead just use
+  # the following two lines to get the path. Although it looks longer here, it
+  # saves forking a process in find_sdk.py so will be faster.
+  #mac_sdk_root = "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX"
+  #mac_sdk_path = mac_sdk_root + mac_sdk_version + ".sdk"
   mac_sdk_path = find_sdk_lines[0]
 }