Add a Physical Web data source

ios/chrome/browser/application_context.h

Index: ios/chrome/browser/application_context.h
diff --git a/ios/chrome/browser/application_context.h b/ios/chrome/browser/application_context.h
index 2e7fbf7a5f73848a4785727b8fbe81df62661d7f..7d14884d97d308fa50a43ca421ca3596416ae024 100644
--- a/ios/chrome/browser/application_context.h
+++ b/ios/chrome/browser/application_context.h
@@ -56,6 +56,7 @@ class VariationsService;
 class ApplicationContext;
 class CRLSetFetcher;
 class IOSChromeIOThread;
+class PhysicalWebDataSource;
 class PrefService;
 
 // Gets the global application context. Cannot return null.
@@ -124,6 +125,9 @@ class ApplicationContext {
   // Gets the CRLSetFetcher.
   virtual CRLSetFetcher* GetCRLSetFetcher() = 0;
 
+  // Gets the PhysicalWebDataSource.
+  virtual PhysicalWebDataSource* GetPhysicalWebDataSource() = 0;
+
  protected:
   // Sets the global ApplicationContext instance.
   static void SetApplicationContext(ApplicationContext* context);