Allow AppSearchProvider to provide recommendations.

chrome/browser/ui/app_list/search/search_controller.cc

 // 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.
 
 #include "chrome/browser/ui/app_list/search/search_controller.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 73 matching lines @@
       new OmniboxProvider(profile_)).Pass());
   AddProvider(Mixer::WEBSTORE_GROUP, scoped_ptr<SearchProvider>(
       new WebstoreProvider(profile_, list_controller_)).Pass());
   if (!CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kDisablePeopleSearch)) {
     AddProvider(Mixer::PEOPLE_GROUP, scoped_ptr<SearchProvider>(
         new PeopleProvider(profile_)).Pass());
   }
 }
 
+void SearchController::FetchRecommendations() {
+  Stop();
+
+  list_controller_->OnSearchStarted();
+
+  dispatching_query_ = true;
+  for (Providers::iterator it = providers_.begin();
+       it != providers_.end();
+       ++it) {
+    (*it)->FetchRecommendations();
+  }
+  dispatching_query_ = false;
+
+  OnResultsChanged();
+  InitiateStopTimer();
+}
+
 void SearchController::Start() {
   Stop();
 
   list_controller_->OnSearchStarted();
 
   base::string16 query;
   base::TrimWhitespace(search_box_->text(), base::TRIM_ALL, &query);
 
   dispatching_query_ = true;
   for (Providers::iterator it = providers_.begin();
        it != providers_.end();
        ++it) {
     (*it)->Start(query);
   }
   dispatching_query_ = false;
 
   OnResultsChanged();
+  InitiateStopTimer();
+}
 
+void SearchController::InitiateStopTimer() {
   // Maximum time (in milliseconds) to wait to the search providers to finish.
   const int kStopTimeMS = 1500;

[Matt Giuca, 2014/07/22 04:31:07]

nit: This constant should be more visible -- at least at the top of this file,
and perhaps in app_list_constants.

[calamity, 2014/07/22 07:24:04]

Done.

   stop_timer_.Start(FROM_HERE,
                     base::TimeDelta::FromMilliseconds(kStopTimeMS),
                     base::Bind(&SearchController::Stop,
                                base::Unretained(this)));
 }
 
 void SearchController::Stop() {
   stop_timer_.Stop();
 
   for (Providers::iterator it = providers_.begin();
@@ skipping 51 matching lines @@
 }
 
 void SearchController::OnSpeechRecognitionStateChanged(
     SpeechRecognitionState new_state) {
   search_box_->SetHintText(l10n_util::GetStringUTF16(
       (new_state == SPEECH_RECOGNITION_HOTWORD_LISTENING) ?
       IDS_SEARCH_BOX_HOTWORD_HINT : IDS_SEARCH_BOX_HINT));
 }
 
 }  // namespace app_list