Use whether a query is from the app list to determine the RLZ parameter.

chrome/browser/autocomplete/base_search_provider.h

 // Copyright 2014 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.
 //
 // This class contains common functionality for search-based autocomplete
 // providers. Search provider and zero suggest provider both use it for common
 // functionality.
 
 #ifndef CHROME_BROWSER_AUTOCOMPLETE_BASE_SEARCH_PROVIDER_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_BASE_SEARCH_PROVIDER_H_
@@ skipping 55 matching lines @@
 
   // AutocompleteProvider:
   virtual void Stop(bool clear_cached_results) OVERRIDE;
   virtual void DeleteMatch(const AutocompleteMatch& match) OVERRIDE;
   virtual void AddProviderInfo(ProvidersInfo* provider_info) const OVERRIDE;
 
   bool field_trial_triggered_in_session() const {
     return field_trial_triggered_in_session_;
   }
 
+  // Sets this as being in the app list.

[Peter Kasting, 2014/04/09 02:12:33]

Nit: No need for a comment here as long as the one on the member below is clear.

[Sam McNally, 2014/04/09 05:33:44]

Done.

+  void set_in_app_list() { in_app_list_ = true; }
+
  protected:
   // The following keys are used to record additional information on matches.
 
   // We annotate our AutocompleteMatches with whether their relevance scores
   // were server-provided using this key in the |additional_info| field.
   static const char kRelevanceFromServerKey[];
 
   // Indicates whether the server said a match should be prefetched.
   static const char kShouldPrefetchKey[];
 
@@ skipping 234 matching lines @@
   // portions of the match contents to distinguish locally-typed text from
   // suggested text.
   //
   // |input| is also necessary for various other details, like whether we should
   // allow inline autocompletion and what the transition type should be.
   // |accepted_suggestion| and |omnibox_start_margin| are used to generate
   // Assisted Query Stats.
   // |append_extra_query_params| should be set if |template_url| is the default
   // search engine, so the destination URL will contain any
   // command-line-specified query params.
+  // |from_app_list| should be set if the search was made from the app list.
   static AutocompleteMatch CreateSearchSuggestion(
       AutocompleteProvider* autocomplete_provider,
       const AutocompleteInput& input,
       const SuggestResult& suggestion,
       const TemplateURL* template_url,
       int accepted_suggestion,
       int omnibox_start_margin,
-      bool append_extra_query_params);
+      bool append_extra_query_params,
+      bool from_app_list);
 
   // Parses JSON response received from the provider, stripping XSSI
   // protection if needed. Returns the parsed data if successful, NULL
   // otherwise.
   static scoped_ptr<base::Value> DeserializeJsonData(std::string json_data);
 
   // Returns whether the requirements for requesting zero suggest results
   // are met. The requirements are
   // * The user is enrolled in a zero suggest experiment.
   // * The user is not on the NTP.
@@ skipping 125 matching lines @@
   // server to handle the results of the deletion. It will be called after the
   // deletion request completes.
   void OnDeletionComplete(bool success,
                           SuggestionDeletionHandler* handler);
 
   // Each deletion handler in this vector corresponds to an outstanding request
   // that a server delete a personalized suggestion. Making this a ScopedVector
   // causes us to auto-cancel all such requests on shutdown.
   SuggestionDeletionHandlers deletion_handlers_;
 
+  // True if this is in the app list. Otherwise, this is in the omnibox.

[Peter Kasting, 2014/04/09 02:12:33]

Nit: Maybe:

True if this provider's results are being displayed in the app list.  By default
this is false, meaning that the results will be shown in the omnibox.

[Sam McNally, 2014/04/09 05:33:44]

Done.

+  bool in_app_list_;
+
   DISALLOW_COPY_AND_ASSIGN(BaseSearchProvider);
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_BASE_SEARCH_PROVIDER_H_