Remove some pass-thrus on RootWindow API in favor of exposing the RootWindowHost again.

chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc

 // Copyright (c) 2012 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 "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 92 matching lines @@
 
   GURL url = ui_test_utils::GetTestUrl(
       base::FilePath().AppendASCII("printing"),
       base::FilePath().AppendASCII("npapi_plugin.html"));
   ui_test_utils::NavigateToURL(browser(), url);
 
   EXPECT_EQ(expected_title, title_watcher.WaitAndGetTitle());
 
   // Now get the region of the plugin before and after the print preview is
   // shown. They should be different.
-  HWND hwnd =
-      tab->GetView()->GetNativeView()->GetDispatcher()->GetAcceleratedWidget();
+  HWND hwnd = tab->GetView()->GetNativeView()->GetDispatcher()->host()->
+      GetAcceleratedWidget();
   HWND child = NULL;
   EnumChildWindows(hwnd, EnumerateChildren,reinterpret_cast<LPARAM>(&child));
 
   RECT region_before, region_after;
   int result = GetWindowRgnBox(child, &region_before);
   ASSERT_EQ(result, SIMPLEREGION);
 
   // Now print preview.
   Print();
 
@@ skipping 12 matching lines @@
   bool rects_equal =
       region_before.left == region_after.left &&
       region_before.top == region_after.top &&
       region_before.right == region_after.right &&
       region_before.bottom == region_after.bottom;
   ASSERT_FALSE(rects_equal);
 }
 #endif
 
 }  // namespace