[Chrome OS] Change layout of the launcher.

ui/app_list/search/mixer.h

 // Copyright 2013 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.
 
 #ifndef UI_APP_LIST_SEARCH_MIXER_H_
 #define UI_APP_LIST_SEARCH_MIXER_H_
 
 #include <stddef.h>
 
 #include <vector>
@@ skipping 26 matching lines @@
   // Adds a new mixer group. A "soft" maximum of |max_results| results will be
   // chosen from this group (if 0, will allow unlimited results from this
   // group). If there aren't enough results from all groups, more than
   // |max_results| may be chosen from this group. Each result in the group will
   // have its score multiplied by |multiplier|. Returns the group's group_id.
   size_t AddGroup(size_t max_results, double multiplier);
 
   // Associates a provider with a mixer group.
   void AddProviderToGroup(size_t group_id, SearchProvider* provider);
 
-  // Collects the results, sorts and publishes them.
-  void MixAndPublish(bool is_voice_query, const KnownResults& known_results);
+  // Collects the results, sorts and publishes them. If |is_empty_query| equals
+  // true, the results are to be shown on the launcher start page.
+  void MixAndPublish(bool is_empty_query,
+                     bool is_voice_query,
+                     const KnownResults& known_results);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(test::MixerTest, Publish);
 
   // Used for sorting and mixing results.
   struct APP_LIST_EXPORT SortData {
     SortData();
     SortData(SearchResult* result, double score);
 
     bool operator<(const SortData& other) const;
@@ skipping 22 matching lines @@
 
   AppListModel::SearchResults* ui_results_;  // Not owned.
   Groups groups_;
 
   DISALLOW_COPY_AND_ASSIGN(Mixer);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_SEARCH_MIXER_H_