Skeleton for app_list on OSX, and refactoring for enable_app_list=1 on OS=="mac".

ui/app_list/views/search_box_view.h

Index: ui/app_list/views/search_box_view.h
diff --git a/ui/app_list/search_box_view.h b/ui/app_list/views/search_box_view.h
similarity index 94%
rename from ui/app_list/search_box_view.h
rename to ui/app_list/views/search_box_view.h
index 50f6f3aef4dd77a32d523c2918a6931789ac75f6..55c4c7971a9c23d40d72b9b0bcc224d1e9bacaac 100644
--- a/ui/app_list/search_box_view.h
+++ b/ui/app_list/views/search_box_view.h
@@ -2,14 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UI_APP_LIST_SEARCH_BOX_VIEW_H_
-#define UI_APP_LIST_SEARCH_BOX_VIEW_H_
+#ifndef UI_APP_LIST_VIEWS_SEARCH_BOX_VIEW_H_
+#define UI_APP_LIST_VIEWS_SEARCH_BOX_VIEW_H_
 
 #include <string>
 
 #include "ui/app_list/search_box_model_observer.h"
-#include "ui/views/view.h"
 #include "ui/views/controls/textfield/textfield_controller.h"
+#include "ui/views/view.h"
 
 namespace views {
 class ImageView;
@@ -76,5 +76,4 @@ class SearchBoxView : public views::View,
 
 }  // namespace app_list
 
-#endif  // UI_APP_LIST_SEARCH_BOX_VIEW_H_
-
+#endif  // UI_APP_LIST_VIEWS_SEARCH_BOX_VIEW_H_