Add a Physical Web omnibox autocomplete provider

ios/chrome/browser/autocomplete/autocomplete_provider_client_impl.cc

Index: ios/chrome/browser/autocomplete/autocomplete_provider_client_impl.cc
diff --git a/ios/chrome/browser/autocomplete/autocomplete_provider_client_impl.cc b/ios/chrome/browser/autocomplete/autocomplete_provider_client_impl.cc
index ba5a6c1605176fc5d7a05919395be2dc9093a800..3c9f572f9c078dceed71d9daae2979a3aaea2e01 100644
--- a/ios/chrome/browser/autocomplete/autocomplete_provider_client_impl.cc
+++ b/ios/chrome/browser/autocomplete/autocomplete_provider_client_impl.cc
@@ -11,6 +11,7 @@
 #include "components/omnibox/browser/autocomplete_classifier.h"
 #include "components/prefs/pref_service.h"
 #include "components/sync_driver/sync_service_utils.h"
+#include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/autocomplete/autocomplete_classifier_factory.h"
 #include "ios/chrome/browser/autocomplete/in_memory_url_index_factory.h"
 #include "ios/chrome/browser/autocomplete/shortcuts_backend_factory.h"
@@ -103,6 +104,11 @@ AutocompleteProviderClientImpl::GetKeywordExtensionsDelegate(
   return nullptr;
 }
 
+PhysicalWebDataSource*
+AutocompleteProviderClientImpl::GetPhysicalWebDataSource() {
+  return GetApplicationContext()->GetPhysicalWebDataSource();
+}
+
 std::string AutocompleteProviderClientImpl::GetAcceptLanguages() const {
   return browser_state_->GetPrefs()->GetString(prefs::kAcceptLanguages);
 }