[Icons NTP] Refactor large_icon_source to extract the logic shared between desktop and Android to f…

chrome/browser/favicon/favicon_service_factory.h

Index: chrome/browser/favicon/favicon_service_factory.h
diff --git a/chrome/browser/favicon/favicon_service_factory.h b/chrome/browser/favicon/favicon_service_factory.h
index fd159de51e1c6eec68aa93b5fb10630b8032bd16..fdbef9e7821f0b788b06fb1df1b6e7d0d677a7f1 100644
--- a/chrome/browser/favicon/favicon_service_factory.h
+++ b/chrome/browser/favicon/favicon_service_factory.h
@@ -12,6 +12,10 @@ template <typename T> struct DefaultSingletonTraits;
 
 class Profile;
 
+namespace content {
+class BrowserContext;
+}
+
 namespace favicon {
 class FaviconService;
 }
@@ -25,6 +29,9 @@ class FaviconServiceFactory : public BrowserContextKeyedServiceFactory {
   static favicon::FaviconService* GetForProfile(Profile* profile,
                                                 ServiceAccessType sat);
 
+  static favicon::FaviconService* GetForBrowserContext(
+      content::BrowserContext* context);
+
   static FaviconServiceFactory* GetInstance();
 
  private: