Remove dead DocumentState metrics tracking code

components/test_runner/web_frame_test_proxy.h

Index: components/test_runner/web_frame_test_proxy.h
diff --git a/components/test_runner/web_frame_test_proxy.h b/components/test_runner/web_frame_test_proxy.h
index 8ee5a26e2bc8560308aed04eb873e3419f04ba0e..ac444304046335918db5624824178fd29d0a7339 100644
--- a/components/test_runner/web_frame_test_proxy.h
+++ b/components/test_runner/web_frame_test_proxy.h
@@ -96,11 +96,9 @@ class WebFrameTestProxy : public Base, public WebFrameTestProxyBase {
                             replaces_current_history_item);
   }
 
-  void didStartProvisionalLoad(blink::WebLocalFrame* frame,
-                               double triggeringEventTime) override {
-    test_client()->didStartProvisionalLoad(frame, triggeringEventTime);
-    Base::didStartProvisionalLoad(
-        frame, triggeringEventTime);
+  void didStartProvisionalLoad(blink::WebLocalFrame* frame) override {
+    test_client()->didStartProvisionalLoad(frame);
+    Base::didStartProvisionalLoad(frame);
   }
 
   void didReceiveServerRedirectForProvisionalLoad(