Revert DidEndMainMessageLoop changes from my earlier checkin since they caused issues on Mac.

chrome/browser/chrome_browser_main_gtk.cc

 // Copyright (c) 2011 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/chrome_browser_main_gtk.h"
 
 #include <gtk/gtk.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
@@ skipping 108 matching lines @@
 
     message = l10n_util::GetStringUTF8(IDS_PRODUCT_NAME);
     gtk_window_set_title(GTK_WINDOW(dialog), message.c_str());
 
     gtk_dialog_run(GTK_DIALOG(dialog));
     gtk_widget_destroy(dialog);
     exit(EXIT_FAILURE);
   }
 }
 
+namespace content {
+
+void DidEndMainMessageLoop() {
+}
+
+}
+
 void RecordBreakpadStatusUMA(MetricsService* metrics) {
 #if defined(USE_LINUX_BREAKPAD)
   metrics->RecordBreakpadRegistration(IsCrashReporterEnabled());
 #else
   metrics->RecordBreakpadRegistration(false);
 #endif
   metrics->RecordBreakpadHasDebugger(base::debug::BeingDebugged());
 }
 
 void WarnAboutMinimumSystemRequirements() {
@@ skipping 35 matching lines @@
 }
 
 void PrepareRestartOnCrashEnviroment(const CommandLine &parsed_command_line) {
 }
 
 void SetBrowserX11ErrorHandlers() {
   // Set up error handlers to make sure profile gets written if X server
   // goes away.
   ui::SetX11ErrorHandlers(BrowserX11ErrorHandler, BrowserX11IOErrorHandler);
 }