Remove views::SingleSplitView as it's presently unused.

chrome/browser/ui/views/frame/browser_view_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 "chrome/browser/ui/views/frame/browser_view.h"
 
 #include "base/macros.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/layout_constants.h"
 #include "chrome/browser/ui/views/bookmarks/bookmark_bar_view.h"
 #include "chrome/browser/ui/views/frame/browser_view_layout.h"
 #include "chrome/browser/ui/views/frame/test_with_browser_view.h"
 #include "chrome/browser/ui/views/frame/top_container_view.h"
 #include "chrome/browser/ui/views/infobars/infobar_container_view.h"
 #include "chrome/browser/ui/views/tabs/tab_strip.h"
 #include "chrome/browser/ui/views/toolbar/toolbar_view.h"
 #include "chrome/common/url_constants.h"
-#include "ui/views/controls/single_split_view.h"
 #include "ui/views/controls/webview/webview.h"
 
 namespace {
 
 // Tab strip bounds depend on the window frame sizes.
 gfx::Point ExpectedTabStripOrigin(BrowserView* browser_view) {
   gfx::Rect tabstrip_bounds(
       browser_view->frame()->GetBoundsForTabStrip(browser_view->tabstrip()));
   gfx::Point tabstrip_origin(tabstrip_bounds.origin());
   views::View::ConvertPointToTarget(browser_view->parent(),
@@ skipping 168 matching lines @@
       header_offset.y();
 
   // The web contents should be flush with the bottom of the header.
   EXPECT_EQ(bottom_of_header, contents_container->y());
 
   // The find bar should overlap the 1px header/web-contents separator at the
   // bottom of the header.
   EXPECT_LT(browser_view()->GetFindBarBoundingBox().y(),
             browser_view()->frame()->GetTopInset(false));
 }