Don't ignore manifest icons for sites that don't have a service worker.

chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h

Index: chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
diff --git a/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h b/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
index fa237dbbe659b5f7b8d07d902d2d0e9f016dd1b5..d6a9545e32cc57eb0591c098623ddd49391f6a9d 100644
--- a/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
+++ b/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
@@ -30,6 +30,7 @@ class Message;
 }
 
 class GURL;
+class InstallableManager;
 struct InstallableData;
 struct WebApplicationInfo;
 
@@ -38,8 +39,7 @@ struct WebApplicationInfo;
 //
 // Because of the various asynchronous calls made by this class, it is
 // refcounted to prevent the class from being prematurely deleted.  If the
-// pointer to the ShortcutHelper becomes invalid, the pipeline should kill
-// itself.
+// |weak_observer| pointer becomes invalid, the pipeline should kill itself.
 class AddToHomescreenDataFetcher
     : public base::RefCounted<AddToHomescreenDataFetcher>,
       public content::WebContentsObserver {
@@ -102,6 +102,9 @@ class AddToHomescreenDataFetcher
   void OnDataTimedout();
 
   // Called when InstallableManager finishes looking for a manifest and icon.
+  void OnDidGetManifestAndIcon(const InstallableData& data);
+
+  // Called when InstallableManager finishes checking for installability.
   void OnDidPerformInstallableCheck(const InstallableData& data);
 
   // Grabs the favicon for the current URL.
@@ -124,6 +127,7 @@ class AddToHomescreenDataFetcher
 
   scoped_refptr<base::TaskRunner> background_task_runner_;
 
+  InstallableManager* installable_manager_;
   Observer* weak_observer_;
 
   // The icons must only be set on the UI thread for thread safety.