Expose browser command line via SystemInfo.

telemetry/telemetry/internal/browser/browser.py

Index: telemetry/telemetry/internal/browser/browser.py
diff --git a/telemetry/telemetry/internal/browser/browser.py b/telemetry/telemetry/internal/browser/browser.py
index 58cca772a1c3ab04d76290fd759b3933117192b2..c68afbcb802d5e2d387e7d3112f4b58977477aaf 100644
--- a/telemetry/telemetry/internal/browser/browser.py
+++ b/telemetry/telemetry/internal/browser/browser.py
@@ -123,6 +123,8 @@ class Browser(app.App):
       system_info = self.GetSystemInfo()
       if system_info.model_name:
         logging.info('Model: %s', system_info.model_name)
+      if system_info.command_line:
+        logging.info('Browser command line: %s', system_info.command_line)
       if system_info.gpu:
         for i, device in enumerate(system_info.gpu.devices):
           logging.info('GPU device %d: %s', i, device)