Record the initial state of the Physical Web at startup

ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.h

Index: ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.h
diff --git a/ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.h b/ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.h
index 40d0ebb021f5a4785bc4d56fe57fbd5413ff1946..20d0756be93f50d4f6b343177532f3fc542a4a93 100644
--- a/ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.h
+++ b/ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.h
@@ -12,14 +12,16 @@
 namespace base {
 class ListValue;
 }
+class PrefService;
 
 @class PhysicalWebScanner;
+@class PhysicalWebInitialStateRecorder;
 
 // iOS implementation of PhysicalWebDataSource
 class IOSChromePhysicalWebDataSource
     : public physical_web::PhysicalWebDataSourceImpl {
  public:
-  IOSChromePhysicalWebDataSource();
+  IOSChromePhysicalWebDataSource(PrefService* pref_service);
   ~IOSChromePhysicalWebDataSource() override;
 
   // Starts scanning for Physical Web URLs. If |network_request_enabled| is
@@ -41,6 +43,9 @@ class IOSChromePhysicalWebDataSource
   // Scanner for nearby Physical Web URL devices.
   base::scoped_nsobject<PhysicalWebScanner> scanner_;
 
+  // Utility for fetching initial application state for logging purposes.
+  base::scoped_nsobject<PhysicalWebInitialStateRecorder> initialStateRecorder_;
+
   DISALLOW_COPY_AND_ASSIGN(IOSChromePhysicalWebDataSource);
 };