Remove chrome_download_delegate.cc

chrome/browser/android/download/chrome_download_delegate.h

-// 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_DOWNLOAD_CHROME_DOWNLOAD_DELEGATE_H_
-#define CHROME_BROWSER_ANDROID_DOWNLOAD_CHROME_DOWNLOAD_DELEGATE_H_
-
-#include "base/android/jni_android.h"
-#include "content/public/browser/web_contents_user_data.h"
-
-class ChromeDownloadDelegate
-    : public content::WebContentsUserData<ChromeDownloadDelegate> {
- public:
-  ~ChromeDownloadDelegate() override;
-
-  // Returns true iff this request resulted in the tab creating the download
-  // to close.
-  static bool EnqueueDownloadManagerRequest(jobject chrome_download_delegate,
-                                            bool overwrite,
-                                            jobject download_info);
-
-  void SetJavaRef(JNIEnv*, jobject obj);
-
-  void RequestFileAccess(intptr_t callback_id);
-
- private:
-  explicit ChromeDownloadDelegate(content::WebContents* contents);
-  friend class content::WebContentsUserData<ChromeDownloadDelegate>;
-
-  // A reference to the Java ChromeDownloadDelegate object.
-  jobject java_ref_;
-};
-
-bool RegisterChromeDownloadDelegate(JNIEnv* env);
-
-#endif  // CHROME_BROWSER_ANDROID_DOWNLOAD_CHROME_DOWNLOAD_DELEGATE_H_