In WinAura, also kill the Metro viewer process in AttemptExit().

chrome/browser/browser_process_platform_part_android.h

Index: chrome/browser/browser_process_platform_part_android.h
diff --git a/chrome/browser/browser_process_platform_part_android.h b/chrome/browser/browser_process_platform_part_android.h
new file mode 100644
index 0000000000000000000000000000000000000000..b15794ea7c9dfc7e48b5bffdb12c1a5b84f1cf29
--- /dev/null
+++ b/chrome/browser/browser_process_platform_part_android.h
@@ -0,0 +1,23 @@
+// Copyright (c) 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.
+
+#ifndef CHROME_BROWSER_BROWSER_PROCESS_PLATFORM_PART_ANDROID_H_
+#define CHROME_BROWSER_BROWSER_PROCESS_PLATFORM_PART_ANDROID_H_
+
+#include "base/basictypes.h"
+#include "chrome/browser/browser_process_platform_part_base.h"
+
+class BrowserProcessPlatformPart : public BrowserProcessPlatformPartBase {
+ public:
+  BrowserProcessPlatformPart();
+  virtual ~BrowserProcessPlatformPart();
+
+  // Overridden from BrowserProcessPlatformPartBase:
+  virtual void AttemptExit() OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BrowserProcessPlatformPart);
+};
+
+#endif  // CHROME_BROWSER_BROWSER_PROCESS_PLATFORM_PART_ANDROID_H_