[Telemetry] Add temporary logging to desktop_browser_finder

telemetry/telemetry/internal/backends/chrome/desktop_browser_finder.py

Index: telemetry/telemetry/internal/backends/chrome/desktop_browser_finder.py
diff --git a/telemetry/telemetry/internal/backends/chrome/desktop_browser_finder.py b/telemetry/telemetry/internal/backends/chrome/desktop_browser_finder.py
index e2cedb744857bbd6886669a9f69166f38ed0d018..4cb919230824254cd2c6560574a49a15d081f0bb 100644
--- a/telemetry/telemetry/internal/backends/chrome/desktop_browser_finder.py
+++ b/telemetry/telemetry/internal/backends/chrome/desktop_browser_finder.py
@@ -123,6 +123,8 @@ def FindAllBrowserTypes(_):
 
 def FindAllAvailableBrowsers(finder_options, device):
   """Finds all the desktop browsers available on this machine."""
+  logging.warning('sys.platform reports %s to DesktopBrowserFinder',
+                  sys.platform)
   if not isinstance(device, desktop_device.DesktopDevice):
     return []