Fix _ValidateLists to work when running in linting mode.

webkit/tools/layout_tests/layout_package/compare_failures.py

Index: webkit/tools/layout_tests/layout_package/compare_failures.py
diff --git a/webkit/tools/layout_tests/layout_package/compare_failures.py b/webkit/tools/layout_tests/layout_package/compare_failures.py
index 5850fda5653ba574bc6e6ba3d5d2015508f0cbb6..c465f7afefed3c5ea189f8689bd63fcff45d0f6e 100644
--- a/webkit/tools/layout_tests/layout_package/compare_failures.py
+++ b/webkit/tools/layout_tests/layout_package/compare_failures.py
@@ -14,7 +14,8 @@ import test_failures
 import test_expectations
 
 
-def PrintFilesFromSet(filenames, header_text, output, opt_expectations=None):
+def PrintFilesFromSet(filenames, header_text, output, opt_expectations=None,
+    opt_relativizeFilenames=True):
   """A helper method to print a list of files to output.
   
   Args:
@@ -35,7 +36,9 @@ def PrintFilesFromSet(filenames, header_text, output, opt_expectations=None):
     output_string += " = %s" % opt_expectations
   output_string += "\n"
   for filename in filenames:
-    output.write(output_string % path_utils.RelativeTestFilename(filename))
+    if opt_relativizeFilenames:
+      filename = path_utils.RelativeTestFilename(filename)
+    output.write(output_string % filename)