[wpr-go] Switch tab_switching.json to use go

Bug: 724381
Change-Id: I38ef54257142367075157c6436f9a773620535ac
Reviewed-on: https://chromium-review.googlesource.com/690755Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Vovo Yang <vovoy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#505241}

tools/perf/contrib/cros_benchmarks/data/tab_switching.json

 {
     "archives": {
         "cros_tab_switching_typical24": {
-            "DEFAULT": "tab_switching.wpr"
+            "DEFAULT": "tab_switching.wprgo"
         }
     },
     "description": "Describes the Web Page Replay archives for a story set. Don't edit by hand! Use record_wpr for updating.",

tools/perf/contrib/cros_benchmarks/data/tab_switching.wpr.sha1

-fdf3c3844b38e9ff07fd3031b7c7f893867460a7
\ No newline at end of file

tools/perf/contrib/cros_benchmarks/data/tab_switching.wprgo.sha1

+42341cef9c0292dd30179051f674cdc0800dd19b
\ No newline at end of file