[AppList] Add a Suggestions Provider to applist.

ui/app_list/search_result.cc

 // Copyright (c) 2012 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.
 
 #include "ui/app_list/search_result.h"
 
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/search_result_observer.h"
 
 namespace app_list {
@@ skipping 58 matching lines @@
                     observers_,
                     OnPercentDownloadedChanged());
 }
 
 int SearchResult::GetPreferredIconDimension() const {
   switch (display_type_) {
     case DISPLAY_TILE:
       return kTileIconSize;
     case DISPLAY_LIST:
       return kListIconSize;
+    case DISPLAY_NONE:
+      return 0;
   }
   NOTREACHED();
   return 0;
 }
 
 void SearchResult::NotifyItemInstalled() {
   FOR_EACH_OBSERVER(SearchResultObserver, observers_, OnItemInstalled());
 }
 
 void SearchResult::NotifyItemUninstalled() {
@@ skipping 12 matching lines @@
 }
 
 void SearchResult::InvokeAction(int action_index, int event_flags) {
 }
 
 ui::MenuModel* SearchResult::GetContextMenuModel() {
   return NULL;
 }
 
 }  // namespace app_list