Add an ID to the ContentSuggestion

ios/chrome/browser/content_suggestions/content_suggestions_mediator.mm

Index: ios/chrome/browser/content_suggestions/content_suggestions_mediator.mm
diff --git a/ios/chrome/browser/content_suggestions/content_suggestions_mediator.mm b/ios/chrome/browser/content_suggestions/content_suggestions_mediator.mm
index 71ffec5748bdbff67487ef4a6dfe148b1df8e2f2..791619f6ef82103cbacc5cda9c4329ee71766b27 100644
--- a/ios/chrome/browser/content_suggestions/content_suggestions_mediator.mm
+++ b/ios/chrome/browser/content_suggestions/content_suggestions_mediator.mm
@@ -13,6 +13,7 @@
 #import "ios/chrome/browser/content_suggestions/content_suggestions_category_wrapper.h"
 #import "ios/chrome/browser/content_suggestions/content_suggestions_service_bridge_observer.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestion.h"
+#import "ios/chrome/browser/ui/content_suggestions/content_suggestion_id.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestions_data_sink.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestions_item.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestions_section_information.h"
@@ -56,6 +57,9 @@ ContentSuggestion* ConvertContentSuggestion(
   suggestion.title = base::SysUTF16ToNSString(contentSuggestion.title());
   suggestion.text = base::SysUTF16ToNSString(contentSuggestion.snippet_text());
   suggestion.url = contentSuggestion.url();
+  suggestion.suggestionID = [[ContentSuggestionID alloc] init];
+  suggestion.suggestionID.IDInSection =
+      contentSuggestion.id().id_within_category();

[lpromero, 2017/02/21 10:33:34]

Out of curiosity: Here the lingo goes from category to section. Still ok?

[gambard, 2017/02/21 14:37:48]

For me it makes sense because this class is making a transition from the
C++/model world, where the suggestions are in categories, to the Objective-C/UI
world, where the suggestions are items in sections.
And maybe we will have a 1 to N mapping between Categories and Sections.

 
   return suggestion;
 }
@@ -185,7 +189,8 @@ ContentSuggestionsSectionInformation* SectionInformationFromCategoryInfo(
   for (auto& contentSuggestion : suggestions) {
     ContentSuggestion* suggestion = ConvertContentSuggestion(contentSuggestion);
     suggestion.type = TypeForCategory(category);
-    suggestion.section = self.sectionInformationByCategory[categoryWrapper];
+    suggestion.suggestionID.sectionInfo =
+        self.sectionInformationByCategory[categoryWrapper];
 
     // TODO(crbug.com/686728): fetch the image.