Fixing path to the protobuf_utils.h file.

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 41e6ae1936f07788919b7018fec342789a8f353c..74955769cf8f7ab71d46f80d883c1165f7f49143 100755
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -491,7 +491,7 @@ def _CheckUsageOfGoogleProtobufNamespace(input_api, output_api):
   """Checks that the namespace google::protobuf has not been used."""
   files = []
   pattern = input_api.re.compile(r'google::protobuf')
-  proto_utils_path = os.path.join('webrtc', 'base', 'protobuf_utils.h')
+  proto_utils_path = os.path.join('webrtc', 'rtc_base', 'protobuf_utils.h')
   for f in input_api.AffectedSourceFiles(input_api.FilterSourceFile):
     if f.LocalPath() in [proto_utils_path, 'PRESUBMIT.py']:
       continue