Prompt user for file access permission before download starts

content/browser/android/mock_download_controller_android.h

Index: content/browser/android/mock_download_controller_android.h
diff --git a/content/browser/android/mock_download_controller_android.h b/content/browser/android/mock_download_controller_android.h
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+// Copyright (c) 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 CONTENT_BROWSER_ANDROID_MOCK_DOWNLOAD_CONTROLLER_ANDROID_H_
+#define CONTENT_BROWSER_ANDROID_MOCK_DOWNLOAD_CONTROLLER_ANDROID_H_
+
+#include "base/callback.h"
+#include "base/memory/singleton.h"
+#include "content/public/browser/android/download_controller_android.h"
+
+namespace content {
+class DownloadItem;
+class WebContents;
+
+// Mock implementation of the DownloadControllerAndroid.
+class MockDownloadControllerAndroid : public DownloadControllerAndroid {
+ public:
+  static MockDownloadControllerAndroid* GetInstance();
+
+  // DownloadControllerAndroid implementation.
+  void CreateGETDownload(int render_process_id, int render_view_id,
+                         int request_id) override;
+  void OnDownloadStarted(DownloadItem* download_item) override;
+  void StartContextMenuDownload(
+      const ContextMenuParams& params, WebContents* web_contents,
+      bool is_link, const std::string& extra_headers) override;
+  void DangerousDownloadValidated(
+      WebContents* web_contents, int download_id, bool accept) override;
+  void AcquireFileAccessPermission(
+      WebContents* web_contents,
+      const AcquireFileAccessPermissionCallback& callback) override;
+  void SetApproveFileAccessRequestForTesting(bool approve) override;
+
+ private:
+  friend struct DefaultSingletonTraits<MockDownloadControllerAndroid>;
+  MockDownloadControllerAndroid();
+  ~MockDownloadControllerAndroid() override;
+
+  bool approve_file_access_request_;
+  DISALLOW_COPY_AND_ASSIGN(MockDownloadControllerAndroid);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_ANDROID_MOCK_DOWNLOAD_CONTROLLER_ANDROID_H_