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

ui/app_list/views/contents_view.h

Index: ui/app_list/views/contents_view.h
diff --git a/ui/app_list/contents_view.h b/ui/app_list/views/contents_view.h
similarity index 93%
rename from ui/app_list/contents_view.h
rename to ui/app_list/views/contents_view.h
index f91cd32a0d2c46a2177abf834570703668908120..41b2837ddf2c8d600c7ffc982d05db4714d1bbb5 100644
--- a/ui/app_list/contents_view.h
+++ b/ui/app_list/views/contents_view.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UI_APP_LIST_CONTENTS_VIEW_H_
-#define UI_APP_LIST_CONTENTS_VIEW_H_
+#ifndef UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_
+#define UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ -71,4 +71,4 @@ class ContentsView : public views::View {
 
 }  // namespace app_list
 
-#endif  // UI_APP_LIST_CONTENTS_VIEW_H_
+#endif  // UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_