Fix directory traversal issue in extension doc server.

chrome/common/extensions/docs/server/index.yaml

Index: chrome/common/extensions/docs/server/index.yaml
diff --git a/chrome/common/extensions/docs/server/index.yaml b/chrome/common/extensions/docs/server/index.yaml
index 3ec808cd529ab3a43d40762f3346ccb07630c0ba..a3b9e05e3517aaecc6ead18158333d2d2a208c74 100644
--- a/chrome/common/extensions/docs/server/index.yaml
+++ b/chrome/common/extensions/docs/server/index.yaml
@@ -1,11 +1,11 @@
-indexes:
-
-# AUTOGENERATED
-
-# This index.yaml is automatically updated whenever the dev_appserver
-# detects that a new type of query is run.  If you want to manage the
-# index.yaml file manually, remove the above marker line (the line
-# saying "# AUTOGENERATED").  If you want to manage some indexes
-# manually, move them above the marker line.  The index.yaml file is
-# automatically uploaded to the admin console when you next deploy
-# your application using appcfg.py.
+indexes:
+
+# AUTOGENERATED
+
+# This index.yaml is automatically updated whenever the dev_appserver
+# detects that a new type of query is run.  If you want to manage the
+# index.yaml file manually, remove the above marker line (the line
+# saying "# AUTOGENERATED").  If you want to manage some indexes
+# manually, move them above the marker line.  The index.yaml file is
+# automatically uploaded to the admin console when you next deploy
+# your application using appcfg.py.