[test] Remove verbose output printing on windows.

The original reason for the extra output on windows is
obsolete since a while. Now the extra output just spams
the logs and causes traffic.

BUG=chromium:485932

Review-Url: https://codereview.chromium.org/2452763003
Cr-Commit-Position: refs/heads/master@{#40580}

tools/run-tests.py

@@ -757,14 +757,8 @@ def Execute(arch, mode, args, options, suites):
     # Predictable mode is slower.
     options.timeout *= 2
 
-  # TODO(machenbach): Remove temporary verbose output on windows after
-  # debugging driver-hung-up on XP.
-  verbose_output = (
-      options.verbose or
-      utils.IsWindows() and options.progress == "verbose"
-  )
   ctx = context.Context(arch, MODES[mode]["execution_mode"], shell_dir,
-                        mode_flags, verbose_output,
+                        mode_flags, options.verbose,
                         options.timeout,
                         options.isolates,
                         options.command_prefix,
@@ -875,7 +869,7 @@ def Execute(arch, mode, args, options, suites):
 
   run_networked = not options.no_network
   if not run_networked:
-    if verbose_output:
+    if options.verbose:
       print("Network distribution disabled, running tests locally.")
   elif utils.GuessOS() != "linux":
     print("Network distribution is only supported on Linux, sorry!")