Fix for rebaseline-cl --only-changed-tests: use hard-coded constant layout test dir.

third_party/WebKit/Tools/Scripts/webkitpy/common/webkit_finder.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/common/webkit_finder.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/common/webkit_finder.py b/third_party/WebKit/Tools/Scripts/webkitpy/common/webkit_finder.py
index 57bf79ba83902f8c1322ce1b471af9451c1aa031..5393a0e3a817205d11bc4bba37a11dc01fd624a4 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/common/webkit_finder.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/common/webkit_finder.py
@@ -88,6 +88,12 @@ class WebKitFinder(object):
     def layout_test_name(self, file_path):
         """Returns a layout test name, given the path from the repo root.
 
+        Note: this appears to not work on Windows; see crbug.com/658795.
+        Also, this function duplicates functionality that's in
+        Port.relative_test_filename.
+        TODO(qyearsley): De-duplicate this and Port.relative_test_filename,
+        and ensure that it works properly with Windows paths.
+
         Args:
             file_path: A relative path from the root of the Chromium repo.