[presubmit_canned_checks] Read DEPS file of modified repository

Read the DEPS file of a modified repository since submodules are coming
from it.

R=yiwzhang@google.com

Fixed: 402396938
Change-Id: I05c91c60b2b1ea58637242fb9970c3fabd58560e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/6344911
Auto-Submit: Josip Sokcevic <sokcevic@chromium.org>
Reviewed-by: Yiwei Zhang <yiwzhang@google.com>
Commit-Queue: Josip Sokcevic <sokcevic@chromium.org>

presubmit_canned_checks.py

@@ -2154,7 +2154,8 @@ def CheckForRecursedeps(input_api, output_api):
     if all(f.LocalPath() != 'DEPS' for f in input_api.AffectedFiles()):
         return []
     # Get DEPS file.
-    deps_file = input_api.os_path.join(input_api.PresubmitLocalPath(), 'DEPS')
+    deps_file = input_api.os_path.join(input_api.change.RepositoryRoot(),
+                                       'DEPS')
     if not input_api.os_path.isfile(deps_file):
         # No DEPS file, carry on!
         return []