[autotest] Compile result summaries into a single html page

The html page allows one to browse the test results and check sizes.

BUG=chromium:716218
TEST=unittest, local build
Rebuild html page:
/usr/local/autotest/tko/parse -l 2 -r -o \
  /usr/local/autotest/results/1355-dshi/100.107.151.233
local view:
http://dshi1.mtv/results/1355-dshi/100.107.151.233/result_summary.html
GS view:
https://storage.cloud.google.com/dshi-test/1355-dshi/100.107.151.233/result_summary.html

Change-Id: I39ac268e3b5da3f1c15cad314a8bf370eff00dfd
Reviewed-on: https://chromium-review.googlesource.com/531605
Commit-Ready: Dan Shi <dshi@google.com>
Tested-by: Dan Shi <dshi@google.com>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
diff --git a/global_config.ini b/global_config.ini
index 8ae8642..09ee09e 100644
--- a/global_config.ini
+++ b/global_config.ini
@@ -271,6 +271,9 @@
 gs_offloading_enabled: True
 image_storage_server: gs://chromeos-image-archive/
 results_storage_server: gs://chromeos-autotest-results/
+# Base url to open a file from Google Storage for `results_storage_server`
+gs_file_base_url: https://storage.cloud.google.com/chromeos-autotest-results/
+
 cts_results_server: gs://chromeos-cts-results/
 cts_apfe_server: gs://chromeos-cts-apfe/
 dev_server: http://100.115.245.199:8082, http://100.115.245.200:8082, http://100.115.219.131:8082, http://100.115.219.132:8082, http://100.115.219.133:8082, http://100.115.219.134:8082, http://100.115.219.137:8082