Revert "[PageLoadMetrics] Keep track of Ad Sizes on Pages"

chrome/browser/page_load_metrics/page_load_tracker.cc

Index: chrome/browser/page_load_metrics/page_load_tracker.cc
diff --git a/chrome/browser/page_load_metrics/page_load_tracker.cc b/chrome/browser/page_load_metrics/page_load_tracker.cc
index c735bb78cd41cbe810ef448a7a3c8edab70814b7..6aab07488e7f4bbe3fb32c3cd0de05d15c483923 100644
--- a/chrome/browser/page_load_metrics/page_load_tracker.cc
+++ b/chrome/browser/page_load_metrics/page_load_tracker.cc
@@ -481,10 +481,8 @@ void PageLoadTracker::WillProcessNavigationResponse(
   // PlzNavigate: NavigationHandle::GetGlobalRequestID() sometimes returns an
   // uninitialized GlobalRequestID. Bail early in this case. See
   // crbug.com/680841 for details.
-  // TODO(jkarlin): NavigationSimulator is the first unittest framework to hit
-  // this function, and it doesn't provide a GlobalRequestID. Add an ID. See
-  // crbug.com/711352 for details.
-  if (navigation_handle->GetGlobalRequestID() == content::GlobalRequestID())
+  if (content::IsBrowserSideNavigationEnabled() &&
+      navigation_handle->GetGlobalRequestID() == content::GlobalRequestID())
     return;
 
   DCHECK(!navigation_request_id_.has_value());
@@ -507,12 +505,6 @@ void PageLoadTracker::Commit(content::NavigationHandle* navigation_handle) {
   LogAbortChainHistograms(navigation_handle);
 }
 
-void PageLoadTracker::DidFinishSubFrameNavigation(
-    content::NavigationHandle* navigation_handle) {
-  INVOKE_AND_PRUNE_OBSERVERS(observers_, OnDidFinishSubFrameNavigation,
-                             navigation_handle);
-}
-
 void PageLoadTracker::FailedProvisionalLoad(
     content::NavigationHandle* navigation_handle,
     base::TimeTicks failed_load_time) {