Add iOS handling to filename_rules.gypi

build/filename_rules.gypi

Index: build/filename_rules.gypi
diff --git a/build/filename_rules.gypi b/build/filename_rules.gypi
index cb97498c9de6791d221a4389ee5a8cb5262b8139..ea63afe0e81eba55ed8010d6f5daa68d29318708 100644
--- a/build/filename_rules.gypi
+++ b/build/filename_rules.gypi
@@ -14,9 +14,15 @@
                     ['exclude', '(^|/)win_[^/]*\\.(h|cc)$'] ],
     }],
     ['OS!="mac" or >(nacl_untrusted_build)==1', {
-      'sources/': [ ['exclude', '_(cocoa|mac)(_unittest)?\\.(h|cc)$'],
-                    ['exclude', '(^|/)(cocoa|mac)/'],
-                    ['exclude', '\\.mm?$' ] ],
+      'sources/': [ ['exclude', '_(cocoa|mac)(_unittest)?\\.(h|cc|mm?)$'],
+                    ['exclude', '(^|/)(cocoa|mac)/'] ],
+    }],
+    ['OS!="ios" or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '_ios(_unittest)?\\.(h|cc|mm?)$'],
+                    ['exclude', '(^|/)ios/'] ],
+    }],
+    ['(OS!="mac" and OS!="ios") or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '\\.mm?$' ] ],
     }],
     # Do not exclude the linux files on *BSD since most of them can be
     # shared at this point.