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 bd97520f2bf35ae4c5f23d44376d87fdaed69665..e343427bf6f4e3e5e7263fdd52e97e7fffb849b4 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"
@@ -1599,6 +1600,10 @@ void BrowserMainLoop::InitializeMemoryManagementComponent() {
                      base::Unretained(coordinator)));
     }
   }
+
+  auto* swap_metrics_observer = SwapMetricsObserver::GetInstance();
+  if (swap_metrics_observer)
+    swap_metrics_observer->Start();
 }
 
 bool BrowserMainLoop::InitializeToolkit() {