mash: Move shelf_navigator.* to //ash/common/shelf

ash/common/shelf/shelf_navigator_unittest.cc

 // Copyright 2013 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 "ash/shelf/shelf_navigator.h"
+#include "ash/common/shelf/shelf_navigator.h"
 
-#include "ash/common/ash_switches.h"
 #include "ash/common/shelf/shelf_item_types.h"
 #include "ash/common/shelf/shelf_model.h"
-#include "ash/shelf/shelf.h"
-#include "base/command_line.h"
 #include "base/macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace ash {
 
 namespace {
 
 class ShelfNavigatorTest : public testing::Test {
  public:
   ShelfNavigatorTest() {}
@@ skipping 101 matching lines @@
   };
   // Special case: no items are 'STATUS_ACTIVE'.
   SetupMockShelfModel(types, arraysize(types), -1);
 
   // If there are no active status, pick the first running item as a fallback.
   EXPECT_EQ(2, GetNextActivatedItemIndex(model(), CYCLE_FORWARD));
   EXPECT_EQ(2, GetNextActivatedItemIndex(model(), CYCLE_BACKWARD));
 }
 
 }  // namespace ash