[Telemetry] Move WPR life cycle from browser to platform

tools/telemetry/telemetry/internal/platform/platform_backend.py

Index: tools/telemetry/telemetry/internal/platform/platform_backend.py
diff --git a/tools/telemetry/telemetry/internal/platform/platform_backend.py b/tools/telemetry/telemetry/internal/platform/platform_backend.py
index 9d5cef1a579c2880b7eed9dd837c70c4bc5bcef6..6b01edb4ebf62d1757bc4b59bc599e2c2b6cecff 100644
--- a/tools/telemetry/telemetry/internal/platform/platform_backend.py
+++ b/tools/telemetry/telemetry/internal/platform/platform_backend.py
@@ -4,6 +4,7 @@
 
 import weakref
 
+from telemetry.internal import forwarders
 from telemetry.internal.forwarders import do_nothing_forwarder
 from telemetry.internal.platform import network_controller_backend
 from telemetry.internal.platform import tracing_controller_backend
@@ -90,33 +91,17 @@ class PlatformBackend(object):
     browser_options = browser_backend.browser_options
     self.SetFullPerformanceModeEnabled(browser_options.full_performance_mode)
 
-    # TODO(slamm): Remove this call when replay browser_backend dependencies
-    # get moved to platform. https://crbug.com/423962
-    self._network_controller_backend.UpdateReplay(browser_backend)
-
   def DidStartBrowser(self, browser, browser_backend):
     assert browser not in self._running_browser_backends
     self._running_browser_backends.add(browser_backend)
 
   def WillCloseBrowser(self, browser, browser_backend):
-    # TODO(slamm): Move this call when replay's life cycle is no longer
-    # tied to the browser. https://crbug.com/424777
-    self._network_controller_backend.StopReplay()
-
     is_last_browser = len(self._running_browser_backends) <= 1
     if is_last_browser:
       self.SetFullPerformanceModeEnabled(False)
 
     self._running_browser_backends.discard(browser_backend)
 
-  @property
-  def wpr_http_device_port(self):
-    return self._network_controller_backend.wpr_http_device_port
-
-  @property
-  def wpr_https_device_port(self):
-    return self._network_controller_backend.wpr_https_device_port
-
   def IsDisplayTracingSupported(self):
     return False