Delete the now-obsolete ChromeMainDelegateStagingAndroid.

chrome/browser/android/chrome_main_delegate_staging_android.h

Index: chrome/browser/android/chrome_main_delegate_staging_android.h
diff --git a/chrome/browser/android/chrome_main_delegate_staging_android.h b/chrome/browser/android/chrome_main_delegate_staging_android.h
deleted file mode 100644
index d176a88bdbad05580773fecccc3deab747905bda..0000000000000000000000000000000000000000
--- a/chrome/browser/android/chrome_main_delegate_staging_android.h
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright 2015 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_ANDROID_CHROME_MAIN_DELEGATE_STAGING_ANDROID_H_
-#define CHROME_BROWSER_ANDROID_CHROME_MAIN_DELEGATE_STAGING_ANDROID_H_
-
-#include "chrome/app/android/chrome_main_delegate_android.h"
-
-class SafeBrowsingApiHandler;
-class DataReductionProxyResourceThrottleFactory;
-
-class ChromeMainDelegateStagingAndroid : public ChromeMainDelegateAndroid {
- public:
-  ChromeMainDelegateStagingAndroid();
-  ~ChromeMainDelegateStagingAndroid() override;
-
-  DISALLOW_COPY_AND_ASSIGN(ChromeMainDelegateStagingAndroid);
-};
-
-#endif  // CHROME_BROWSER_ANDROID_CHROME_MAIN_DELEGATE_STAGING_ANDROID_H_