Reload all ContentSuggestions on notification

ios/chrome/browser/content_suggestions/content_suggestions_mediator.mm

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/content_suggestions/content_suggestions_mediator.h"
 
 #include "base/mac/bind_objc_block.h"
 #include "base/memory/ptr_util.h"
 #include "base/optional.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 195 matching lines @@
   ContentSuggestionIdentifier* suggestionIdentifier =
       [[ContentSuggestionIdentifier alloc] init];
   suggestionIdentifier.IDInSection = suggestion_id.id_within_category();
   suggestionIdentifier.sectionInfo = self.sectionInformationByCategory[wrapper];
 
   [self.dataSink clearSuggestion:suggestionIdentifier];
 }
 
 - (void)contentSuggestionsServiceFullRefreshRequired:
     (ntp_snippets::ContentSuggestionsService*)suggestionsService {
-  // Update dataSink.
+  [self.dataSink reloadAllData];
 }
 
 - (void)contentSuggestionsServiceShutdown:
     (ntp_snippets::ContentSuggestionsService*)suggestionsService {
   // Update dataSink.
 }
 
 #pragma mark - ContentSuggestionsImageFetcher
 
 - (void)fetchImageForSuggestion:
@@ skipping 35 matching lines @@
       wrapperWithCategory:category]] = sectionInfo;
 }
 
 - (ContentSuggestionsCategoryWrapper*)categoryWrapperForSectionInfo:
     (ContentSuggestionsSectionInformation*)sectionInfo {
   return [[self.sectionInformationByCategory allKeysForObject:sectionInfo]
       firstObject];
 }
 
 @end