Update apps grid view layout to match latest mocks.

ui/app_list/views/folder_header_view.cc

 // Copyright (c) 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 "ui/app_list/views/folder_header_view.h"
 
 #include <algorithm>
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/app_list/app_list_constants.h"
@@ skipping 183 matching lines @@
 
 void FolderHeaderView::OnPaint(gfx::Canvas* canvas) {
   views::View::OnPaint(canvas);
 
   gfx::Rect rect(GetContentsBounds());
   if (rect.IsEmpty() || !folder_name_visible_)
     return;
 
   // Draw bottom separator line.
   int horizontal_padding = app_list::switches::IsExperimentalAppListEnabled()
-                               ? kExperimentalWindowPadding
+                               ? kExperimentalAppsGridPadding
                                : kBottomSeparatorPadding;
   rect.Inset(horizontal_padding, 0);
   rect.set_y(rect.bottom() - kBottomSeparatorHeight);
   rect.set_height(kBottomSeparatorHeight);
   canvas->FillRect(rect, kTopSeparatorColor);
 }
 
 void FolderHeaderView::ContentsChanged(views::Textfield* sender,
                                        const base::string16& new_contents) {
   // Temporarily remove from observer to ignore data change caused by us.
@@ skipping 16 matching lines @@
 void FolderHeaderView::ButtonPressed(views::Button* sender,
                                      const ui::Event& event) {
   delegate_->NavigateBack(folder_item_, event);
 }
 
 void FolderHeaderView::ItemNameChanged() {
   Update();
 }
 
 }  // namespace app_list