Record swap metrics

content/browser/browser_main_loop.cc

Index: content/browser/browser_main_loop.cc
diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
index b024d9fc7fee9e5b5d2526a2c8c5017db6a3d118..529af4953bcc9841af8d9330159a6f3f0da9b9d2 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -68,6 +68,7 @@
 #include "content/browser/loader_delegate_impl.h"
 #include "content/browser/media/media_internals.h"
 #include "content/browser/memory/memory_coordinator_impl.h"
+#include "content/browser/memory/swap_metrics_observer.h"
 #include "content/browser/net/browser_online_state_observer.h"
 #include "content/browser/renderer_host/media/media_stream_manager.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
@@ -1594,6 +1595,10 @@ void BrowserMainLoop::InitializeMemoryManagementComponent() {
                      base::Unretained(coordinator)));
     }
   }
+
+  auto* swap_metrics_observer = SwapMetricsObserver::GetInstance();
+  if (swap_metrics_observer)
+    swap_metrics_observer->Start();
 }
 
 bool BrowserMainLoop::InitializeToolkit() {