Add the project information to each file's header comment.

BUG=None
TEST=None

Change-Id: I362bfbf18c42025a0248714aa5d69ecfaa1daa2b
Reviewed-on: https://gerrit-int.chromium.org/40826
Reviewed-by: Luis Lozano <llozano@chromium.org>
Commit-Queue: Yuheng Long <yuhenglong@google.com>
Tested-by: Yuheng Long <yuhenglong@google.com>
diff --git a/bestflags/pipeline_process.py b/bestflags/pipeline_process.py
index 29d88f5..c5a7b8b 100644
--- a/bestflags/pipeline_process.py
+++ b/bestflags/pipeline_process.py
@@ -1,5 +1,7 @@
 """Pipeline process that encapsulates the actual content.
 
+Part of the Chrome build flags optimization.
+
 The actual stages include the builder and the executor.
 """