Make `gn refs` handle files in data directories properly.

tools/gn/command_refs.cc

Index: tools/gn/command_refs.cc
diff --git a/tools/gn/command_refs.cc b/tools/gn/command_refs.cc
index fcd824a6842ea72bef034ec308055d02d8a17664..179535075ad6eee474a338ea80b673fc93efd38e 100644
--- a/tools/gn/command_refs.cc
+++ b/tools/gn/command_refs.cc
@@ -143,6 +143,9 @@ bool TargetContainsFile(const Target* target, const SourceFile& file) {
   for (const auto& cur_file : target->data()) {
     if (cur_file == file.value())
       return true;
+    if (cur_file.back() == '/' &&
+        !strncmp(cur_file.c_str(), file.value().c_str(), cur_file.size() - 1))

[brettw, 2016/07/20 17:52:14]

How about
cur_file.back() == '/' &&
!base::StartsWith(file, cur_file, base::CompareCase::SENSITIVE);

[Dirk Pranke, 2016/07/20 21:24:31]

I figured there was some base routine for this but hadn't tracked it down. Will
change.

+      return true;
   }
 
   if (target->action_values().script().value() == file.value())