Record the initial state of the Physical Web at startup

ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.mm

Index: ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.mm
diff --git a/ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.mm b/ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.mm
index 80c074479920ed699f1e66ac5d5ba901b6548518..f2dcdeea51e9cca922f4e3948db359491f40c947 100644
--- a/ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.mm
+++ b/ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.mm
@@ -6,11 +6,18 @@
 
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
+#import "ios/chrome/browser/physical_web/physical_web_initial_state_recorder.h"
 #import "ios/chrome/common/physical_web/physical_web_scanner.h"
 
-IOSChromePhysicalWebDataSource::IOSChromePhysicalWebDataSource() {}
+IOSChromePhysicalWebDataSource::IOSChromePhysicalWebDataSource(
+    PrefService* pref_service) {
+  initialStateRecorder_.reset([[PhysicalWebInitialStateRecorder alloc]
+      initWithPrefService:pref_service]);
+  [initialStateRecorder_ collectAndRecordState];
+}
 
 IOSChromePhysicalWebDataSource::~IOSChromePhysicalWebDataSource() {
+  [initialStateRecorder_ invalidate];
   StopDiscovery();
 }