Disable browse:search:google on windows

The browser crashes when trying to run this story.

BUG=673775

Review-Url: https://codereview.chromium.org/2570883002
Cr-Commit-Position: refs/heads/master@{#438214}

tools/perf/page_sets/system_health/browsing_stories.py

@@ -237,6 +237,7 @@ class WashingtonPostMobileStory(_NewsBrowsingStory):
 ##############################################################################
 
 
+@decorators.Disabled('win')  # crbug.com/673775
 class GoogleDesktopStory(_NewsBrowsingStory):
   """
   A typical google search story: