Remove old (dead) app list code.

ash/shell/app_list.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 <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "ash/common/session/session_state_delegate.h"
@@ skipping 198 matching lines @@
     for (int i = 0; i < static_cast<int>(WindowTypeShelfItem::LAST_TYPE); ++i) {
       WindowTypeShelfItem::Type type =
           static_cast<WindowTypeShelfItem::Type>(i);
       std::string id = base::IntToString(i);
       std::unique_ptr<WindowTypeShelfItem> shelf_item(
           new WindowTypeShelfItem(id, type));
       model_->AddItem(std::move(shelf_item));
     }
   }
 
-  gfx::ImageSkia CreateSearchBoxIcon() {
-    const base::string16 icon_text = base::ASCIIToUTF16("ash");
-    const gfx::Size icon_size(32, 32);
-
-    gfx::Canvas canvas(icon_size, 1.0f, false /* is_opaque */);
-    canvas.DrawStringRectWithFlags(
-        icon_text, gfx::FontList(), SK_ColorBLACK, gfx::Rect(icon_size),
-        gfx::Canvas::TEXT_ALIGN_CENTER | gfx::Canvas::NO_SUBPIXEL_RENDERING);
-
-    return gfx::ImageSkia(canvas.ExtractImageRep());
-  }
-
   void DecorateSearchBox(app_list::SearchBoxModel* search_box_model) {
-    search_box_model->SetIcon(CreateSearchBoxIcon());
     search_box_model->SetHintText(base::ASCIIToUTF16("Type to search..."));
   }
 
   // Overridden from app_list::AppListViewDelegate:
   bool ForceNativeDesktop() const override { return false; }
 
   void SetProfileByPath(const base::FilePath& profile_path) override {
     // Nothing needs to be done.
   }
 
   const Users& GetUsers() const override { return users_; }
 
-  bool ShouldCenterWindow() const override { return false; }
-
   app_list::AppListModel* GetModel() override { return model_.get(); }
 
   app_list::SpeechUIModel* GetSpeechUI() override { return &speech_ui_; }
 
   void OpenSearchResult(app_list::SearchResult* result,
                         bool auto_launch,
                         int event_flags) override {
     const ExampleSearchResult* example_result =
         static_cast<const ExampleSearchResult*>(result);
     WindowTypeShelfItem::ActivateItem(example_result->type(), event_flags);
@@ skipping 86 matching lines @@
 };
 
 }  // namespace
 
 app_list::AppListViewDelegate* CreateAppListViewDelegate() {
   return new ExampleAppListViewDelegate;
 }
 
 }  // namespace shell
 }  // namespace ash