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 0dc52fcaf88e98e2dcf3b4a4858b357f8210f0ad..3eab6366249432e15b7c1a548c88fea8395ac9ae 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -69,6 +69,7 @@
 #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"
@@ -1587,6 +1588,10 @@ void BrowserMainLoop::InitializeMemoryManagementComponent() {
                      base::Unretained(coordinator)));
     }
   }
+
+  auto* swap_metrics_observer = SwapMetricsObserver::GetInstance();
+  if (swap_metrics_observer)
+    swap_metrics_observer->Start();
 }
 
 bool BrowserMainLoop::InitializeToolkit() {