Optimization: not sending answer server requests for voice queries.

ui/app_list/search_controller.cc

Index: ui/app_list/search_controller.cc
diff --git a/ui/app_list/search_controller.cc b/ui/app_list/search_controller.cc
index 83cca8d94661d2c13fbe7f725dad73d82454f0d1..cae058357c4ea02bff3b211b9500e84fc20b9722 100644
--- a/ui/app_list/search_controller.cc
+++ b/ui/app_list/search_controller.cc
@@ -36,21 +36,21 @@ SearchController::SearchController(SearchBoxModel* search_box,
 SearchController::~SearchController() {
 }
 
-void SearchController::Start(bool is_voice_query) {
+void SearchController::Start() {
   Stop();
 
   base::string16 query;
   base::TrimWhitespace(search_box_->text(), base::TRIM_ALL, &query);
 
+  is_voice_query_ = search_box_->is_voice_query();
+
   dispatching_query_ = true;
   for (const auto& provider : providers_)
-    provider->Start(is_voice_query, query);
+    provider->Start(is_voice_query_, query);
 
   dispatching_query_ = false;
   query_for_recommendation_ = query.empty() ? true : false;
 
-  is_voice_query_ = is_voice_query;
-
   OnResultsChanged();
 
   stop_timer_.Start(FROM_HERE,