[chromedriver] Drop support for M53 and add M56

chrome/test/chromedriver/test/run_all_tests.py

Index: chrome/test/chromedriver/test/run_all_tests.py
diff --git a/chrome/test/chromedriver/test/run_all_tests.py b/chrome/test/chromedriver/test/run_all_tests.py
index a2556d3ad7956728e116b795c459c6f156d341a8..3d4d8779358c83fbb8e36c5d98bd1b73f252080e 100755
--- a/chrome/test/chromedriver/test/run_all_tests.py
+++ b/chrome/test/chromedriver/test/run_all_tests.py
@@ -193,15 +193,15 @@ def main():
       # Linux32 builds need to be special-cased, because 1) they are keyed by
       # git hash rather than commit position, and 2) come from a different
       # download site (so we can't just convert the commit position to a hash).
+      versions['56'] = '67002b0fdaa3123f10f96fa2f7965677d531db74'
       versions['55'] = 'e9bc4e0245c9a1e570ed2cf8e12152b9122275f2'
       versions['54'] = '13d140acdaa710770f42790044825b49f99e466c'
-      versions['53'] = 'ac799c2fd50b8fb62b7a8186ff78b025de5b8718'
       # TODO(samuong): speculative fix for crbug.com/611886
       os.environ['CHROME_DEVEL_SANDBOX'] = '/opt/chromium/chrome_sandbox'
     else:
+      versions['56'] = '433020'
       versions['55'] = '423791'
       versions['54'] = '414545'
-      versions['53'] = '403392'
     code = 0
     for version, revision in versions.iteritems():
       if options.chrome_version and version != options.chrome_version: