Revert "[telemetry] Wire TsProxy through telemetry's network stack."

telemetry/telemetry/testing/browser_test_case.py

Index: telemetry/telemetry/testing/browser_test_case.py
diff --git a/telemetry/telemetry/testing/browser_test_case.py b/telemetry/telemetry/testing/browser_test_case.py
index 956e5d85e8a8b8994fabde0f699e0658f50f3522..9eff8eec1f4716dd7f78fab44a6a19d6b5718f96 100644
--- a/telemetry/telemetry/testing/browser_test_case.py
+++ b/telemetry/telemetry/testing/browser_test_case.py
@@ -85,8 +85,6 @@ class BrowserTestCase(unittest.TestCase):
       browser_to_create = browser_finder.FindBrowser(options)
       if not browser_to_create:
         raise Exception('No browser found, cannot continue test.')
-      cls._platform = browser_to_create.platform
-      cls._platform.network_controller.InitializeIfNeeded()
 
       try:
         current_browser = browser_to_create.Create(options)
@@ -95,13 +93,13 @@ class BrowserTestCase(unittest.TestCase):
         cls.tearDownClass()
         raise
     cls._browser = current_browser
+    cls._platform = current_browser.platform
     cls._device = options.remote_platform_options.device
 
   @classmethod
   def tearDownClass(cls):
     if cls._platform:
       cls._platform.StopAllLocalServers()
-      cls._platform.network_controller.Close()
 
   @classmethod
   def CustomizeBrowserOptions(cls, options):