[NTP::PhysicalWeb] Implement suggestion dismissal.

chrome/browser/prefs/browser_prefs.cc

Index: chrome/browser/prefs/browser_prefs.cc
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index 4d6a7196dc0d87b6e71b5169164a7fc506ab95a1..d2422c016d950892fe1e42d086fb5528b31229d8 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -164,6 +164,9 @@
 
 #if defined(OS_ANDROID)
 #include "chrome/browser/android/preferences/browser_prefs_android.h"
+#include "chrome/browser/ntp_snippets/download_suggestions_provider.h"
+#include "components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.h"
+#include "components/ntp_snippets/physical_web_pages/physical_web_page_suggestions_provider.h"
 #else
 #include "chrome/browser/services/gcm/gcm_product_util.h"
 #include "chrome/browser/signin/signin_promo.h"
@@ -582,6 +585,13 @@ void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
   signin::RegisterProfilePrefs(registry);
 #endif
 
+#if defined(OS_ANDROID)
+  DownloadSuggestionsProvider::RegisterProfilePrefs(registry);
+  ntp_snippets::PhysicalWebPageSuggestionsProvider::RegisterProfilePrefs(
+      registry);
+  ntp_snippets::RecentTabSuggestionsProvider::RegisterProfilePrefs(registry);
+#endif  // defined(OS_ANDROID)
+
 #if !defined(OS_ANDROID)
   browser_sync::ForeignSessionHandler::RegisterProfilePrefs(registry);
   gcm::GCMChannelStatusSyncer::RegisterProfilePrefs(registry);