Don't flag third_party/boringssl as needing README.chromium changes.

third_party/PRESUBMIT.py

Index: third_party/PRESUBMIT.py
diff --git a/third_party/PRESUBMIT.py b/third_party/PRESUBMIT.py
index e42ad8a474f477ff82e259d5cd291c815721ffd3..662168d1d6d00e203363ca7b0696b17fb07a6645 100644
--- a/third_party/PRESUBMIT.py
+++ b/third_party/PRESUBMIT.py
@@ -33,7 +33,7 @@ def LicenseIsCompatibleWithAndroid(input_api, license):
 def _CheckThirdPartyReadmesUpdated(input_api, output_api):
   """
   Checks to make sure that README.chromium files are properly updated
-  when dependancies in third_party are modified.
+  when dependencies in third_party are modified.
   """
   readmes = []
   files = []
@@ -44,7 +44,9 @@ def _CheckThirdPartyReadmesUpdated(input_api, output_api):
       continue
     if (local_path.startswith('third_party' + input_api.os_path.sep) and
         not local_path.startswith('third_party' + input_api.os_path.sep +
-                                  'WebKit' + input_api.os_path.sep)):
+                                  'WebKit' + input_api.os_path.sep) and
+        not local_path.startswith('third_party' + input_api.os_path.sep +
+                                  'boringssl' + input_api.os_path.sep)):
       files.append(f)
       if local_path.endswith("README.chromium"):
         readmes.append(f)