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

Index: chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc b/chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc
index dd3700d3292836ff68e57ff89e95e820b55695d3..dd4cdcbd7506c21a1f42899078a7556d79bd2d15 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc
+++ b/chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc
@@ -110,8 +110,8 @@ IN_PROC_BROWSER_TEST_F(PrintPreviewTest, WindowedNPAPIPluginHidden) {
 
   // 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));