msvc helper: attempt to filter out when it prints the input filename

This is a heuristic but it appears to work for the Chrome build.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/msvc_helper.h b/src/msvc_helper.h
index 5a657be..5bf9787 100644
--- a/src/msvc_helper.h
+++ b/src/msvc_helper.h
@@ -34,5 +34,11 @@ struct CLWrapper {
   /// Exposed for testing.
   static string FilterShowIncludes(const string& line);
 
+  /// Parse a line of cl.exe output and return true if it looks like
+  /// it's printing an input filename.  This is a heuristic but it appears
+  /// to be the best we can do.
+  /// Exposed for testing.
+  static bool FilterInputFilename(const string& line);
+
   vector<string> includes_;
 };