app_list: Fix blank search results caused by whitespace.

ui/app_list/app_list_view.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/app_list_view.h"
 
+#include "base/string_util.h"
 #include "ui/app_list/app_list_bubble_border.h"
 #include "ui/app_list/app_list_item_view.h"
 #include "ui/app_list/app_list_model.h"
 #include "ui/app_list/app_list_view_delegate.h"
 #include "ui/app_list/contents_view.h"
 #include "ui/app_list/pagination_model.h"
 #include "ui/app_list/search_box_model.h"
 #include "ui/app_list/search_box_view.h"
 #include "ui/gfx/insets.h"
 #include "ui/views/bubble/bubble_frame_view.h"
@@ skipping 150 matching lines @@
       anchor_rect);
 
   // Repaints border if arrow offset is changed.
   if (bubble_border_->offset() != old_offset)
     GetBubbleFrameView()->SchedulePaint();
 
   return bubble_rect;
 }
 
 void AppListView::QueryChanged(SearchBoxView* sender) {
-  bool should_show_search = !model_->search_box()->text().empty();
+  string16 query;
+  TrimWhitespace(model_->search_box()->text(), TRIM_ALL, &query);
+  bool should_show_search = !query.empty();
   contents_view_->ShowSearchResults(should_show_search);
 
   if (delegate_.get()) {
     if (should_show_search)
       delegate_->StartSearch();
     else
       delegate_->StopSearch();
   }
 }
 
 void AppListView::OpenResult(const SearchResult& result, int event_flags) {
   if (delegate_.get())
     delegate_->OpenSearchResult(result, event_flags);
   Close();
 }
 
 }  // namespace app_list