Revert 134740 - Root window wasn't shown in browser_test.

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
===================================================================
--- chrome/browser/chrome_browser_main.cc	(revision 134755)
+++ chrome/browser/chrome_browser_main.cc	(working copy)
@@ -182,6 +182,14 @@
 #include "chrome/browser/chrome_browser_main_x11.h"
 #endif
 
+#if defined(USE_AURA)
+#include "ui/aura/root_window.h"
+#endif
+
+#if defined(USE_ASH)
+#include "ash/shell.h"
+#endif
+
 using content::BrowserThread;
 
 namespace {
@@ -1889,6 +1897,7 @@
 bool ChromeBrowserMainParts::MainMessageLoopRun(int* result_code) {
   // Set the result code set in PreMainMessageLoopRun or set above.
   *result_code = result_code_;
+
   if (!run_message_loop_)
     return true;  // Don't run the default message loop.
 
@@ -1896,7 +1905,11 @@
   // UI thread message loop as possible to get a stable measurement
   // across versions.
   RecordBrowserStartupTime();
+
 #if defined(USE_AURA)
+#if defined(USE_ASH)
+  ash::Shell::GetRootWindow()->ShowRootWindow();
+#endif
   MessageLoopForUI::current()->Run();
 #elif defined(TOOLKIT_VIEWS)
   views::AcceleratorHandler accelerator_handler;