Don't check licenses in chrome/common/extensions/docs/server2/third_party.

This is failing 75% of the time. This directory is created by copying files from other parts of the tree, and some of those have suppressions. So don't duplicate those suppressions. Also, this code isn't shipped.

BUG=382995
R=thestig@chromium.org

Review URL: https://codereview.chromium.org/409913005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284750 0039d316-1c4b-4281-b951-d872f2087c98

tools/checklicenses/checklicenses.py

@@ -114,6 +114,12 @@ PATH_SPECIFIC_WHITELISTED_LICENSES = {
     'chrome/common/extensions/docs/examples': [  # http://crbug.com/98092
         'UNKNOWN',
     ],
+    # This contains files copied from elsewhere from the tree. Since the copied
+    # directories might have suppressions below (like simplejson), whitelist the
+    # whole directory. This is also not shipped code.
+    'chrome/common/extensions/docs/server2/third_party': [
+        'UNKNOWN',
+    ],
     'courgette/third_party/bsdiff_create.cc': [  # http://crbug.com/98095
         'UNKNOWN',
     ],