rebaseline-cl: Get latest try jobs using git-cl when no --issue given.

third_party/WebKit/Tools/Scripts/webkitpy/common/net/buildbot.py

 # Copyright (c) 2009, Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 112 matching lines @@
 
 
 def current_build_link(host):
     """Returns a link to the current job if running on buildbot, or None."""
     master_name = host.environ.get('BUILDBOT_MASTERNAME')
     builder_name = host.environ.get('BUILDBOT_BUILDERNAME')
     build_number = host.environ.get('BUILDBOT_BUILDNUMBER')
     if not (master_name and builder_name and build_number):
         return None
     return 'https://build.chromium.org/p/%s/builders/%s/builds/%s' % (master_name, builder_name, build_number)
+
+
+def filter_latest_builds(builds):
+    """Filters Build objects to include only the latest for each builder.
+
+    Args:
+        builds: A collection of Build objects.
+
+    Returns:
+        A list of Build objects; only one Build object per builder name. If
+        there are only Builds with no build number, then one is kept; if there
+        are Builds with build numbers, then the one with the highest build
+        number is kept. Builds with the highest
+    """
+    builder_to_latest_build = {}
+    for build in builds:
+        if build.builder_name not in builder_to_latest_build:
+            builder_to_latest_build[build.builder_name] = build
+        elif build.build_number > builder_to_latest_build[build.builder_name].build_number:
+            builder_to_latest_build[build.builder_name] = build

[wkorman, 2017/02/17 23:24:00]

Same as two lines up -- could turn these 4 lines into "if (a or b):
builder_to_latest_build[build.builder_name] = build"?

[qyearsley, 2017/02/17 23:45:34]

Yep! Good catch. Now removed this repetition.

+    return sorted(builder_to_latest_build.values())