[Content suggestions] Add a function to the service API to fetch favicons

chrome/browser/android/ntp/ntp_snippets_bridge.h

Index: chrome/browser/android/ntp/ntp_snippets_bridge.h
diff --git a/chrome/browser/android/ntp/ntp_snippets_bridge.h b/chrome/browser/android/ntp/ntp_snippets_bridge.h
index be7f42f1459b695c4272e8103f02a491a192b0a7..ab2adc992573cb12e7353796c647a2ebc4225678 100644
--- a/chrome/browser/android/ntp/ntp_snippets_bridge.h
+++ b/chrome/browser/android/ntp/ntp_snippets_bridge.h
@@ -60,6 +60,15 @@ class NTPSnippetsBridge
       const base::android::JavaParamRef<jstring>& id_within_category,
       const base::android::JavaParamRef<jobject>& j_callback);
 
+  void FetchSuggestionFavicon(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      jint j_category_id,
+      const base::android::JavaParamRef<jstring>& id_within_category,
+      jint j_minimum_size_in_pixel,
+      jint j_desired_size_in_pixel,
+      const base::android::JavaParamRef<jobject>& j_callback);
+
   void Fetch(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,