Add more logging when fetching layout test results.

third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/rebaseline_cl_unittest.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import json
 import optparse
 
 from webkitpy.common.net.buildbot import Build
 from webkitpy.common.net.git_cl import GitCL
 from webkitpy.common.checkout.git_mock import MockGit
@@ skipping 293 matching lines @@
         # A build number of None implies that a job has been started but not finished yet.
         self.assertEqual(
             self.command.builders_with_pending_builds([Build('MOCK Try Linux', None), Build('MOCK Try Win', 123)]),
             {'MOCK Try Linux'})
 
     def test_bails_when_one_build_is_missing_results(self):
         self.tool.buildbot.set_results(Build('MOCK Try Win', 5000), None)
         return_code = self.command.execute(self.command_options(), [], self.tool)
         self.assertEqual(return_code, 1)
         self.assertLog([
-            'ERROR: Failed to fetch results from '
-            '"https://storage.googleapis.com/chromium-layout-test-archives/MOCK_Try_Win/5000/layout-test-results".\n'
-            'Try starting a new job for MOCK Try Win by running :\n'
-            '  git cl try -b MOCK Try Win\n'
+            'ERROR: Failed to fetch results for: Build(builder_name=\'MOCK Try Win\', build_number=5000)\n',
+            'ERROR: Results were expected to exist at:\n'
+            'https://storage.googleapis.com/chromium-layout-test-archives/MOCK_Try_Win/5000/layout-test-results/results.html\n',
+            'ERROR: If the job failed, you could retry by running:\n'
+            'git cl try -b MOCK Try Win\n'
         ])
 
     def test_bails_when_there_are_unstaged_baselines(self):
         git = self.tool.git()
         git.unstaged_changes = lambda: {'third_party/WebKit/LayoutTests/my-test-expected.txt': '?'}
         return_code = self.command.execute(self.command_options(), [], self.tool)
         self.assertEqual(return_code, 1)
         self.assertLog([
             'ERROR: Aborting: there are unstaged baselines:\n',
             'ERROR:   /mock-checkout/third_party/WebKit/LayoutTests/my-test-expected.txt\n',
         ])