Move DownloadControllerAndroid from content/ to chrome/

chrome/browser/android/download/download_controller.h

+// Copyright 2016 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.
+
+// This class pairs with DownloadController on Java side to forward requests
+// for GET downloads to the current DownloadListener. POST downloads are
+// handled on the native side.
+//
+// Both classes are Singleton classes. C++ object owns Java object.
+//
+// Call sequence
+// GET downloads:
+// DownloadController::CreateGETDownload() =>
+// DownloadController.newHttpGetDownload() =>
+// DownloadListener.onDownloadStart() /
+// DownloadListener2.requestHttpGetDownload()
+//
+
+#ifndef CHROME_BROWSER_ANDROID_DOWNLOAD_DOWNLOAD_CONTROLLER_H_
+#define CHROME_BROWSER_ANDROID_DOWNLOAD_DOWNLOAD_CONTROLLER_H_
+
+#include "base/android/scoped_java_ref.h"
+#include "base/memory/singleton.h"
+#include "chrome/browser/android/download/download_controller_base.h"
+
+namespace net {
+class URLRequest;
+}
+
+namespace ui {
+class WindowAndroid;
+}
+
+namespace content {
+class WebContents;
+}
+
+class DownloadController : public DownloadControllerBase {
+ public:
+  static DownloadController* GetInstance();
+
+  static bool RegisterDownloadController(JNIEnv* env);
+
+  // Called when DownloadController Java object is instantiated.
+  void Init(JNIEnv* env, jobject obj);
+
+  // DownloadControllerBase implementation.
+  void AcquireFileAccessPermission(
+      content::WebContents* web_contents,
+      const AcquireFileAccessPermissionCallback& callback) override;
+  void SetDefaultDownloadFileName(const std::string& file_name) override;
+
+  // UMA histogram enum for download cancellation reasons. Keep this
+  // in sync with MobileDownloadCancelReason in histograms.xml. This should be
+  // append only.
+  enum DownloadCancelReason {
+    CANCEL_REASON_NOT_CANCELED = 0,
+    CANCEL_REASON_ACTION_BUTTON,
+    CANCEL_REASON_NOTIFICATION_DISMISSED,
+    CANCEL_REASON_OVERWRITE_INFOBAR_DISMISSED,
+    CANCEL_REASON_NO_STORAGE_PERMISSION,
+    CANCEL_REASON_MAX
+  };
+  static void RecordDownloadCancelReason(DownloadCancelReason reason);
+
+ private:
+  struct JavaObject;
+  friend struct base::DefaultSingletonTraits<DownloadController>;
+  DownloadController();
+  ~DownloadController() override;
+
+  // Helper method for implementing AcquireFileAccessPermission().
+  bool HasFileAccessPermission(ui::WindowAndroid* window_android);
+
+  // DownloadControllerBase implementation.
+  void CreateGETDownload(int render_process_id,
+                         int render_view_id,
+                         bool must_download,
+                         const DownloadInfo& info) override;
+  void OnDownloadStarted(content::DownloadItem* download_item) override;
+  void StartContextMenuDownload(const content::ContextMenuParams& params,
+                                content::WebContents* web_contents,
+                                bool is_link,
+                                const std::string& extra_headers) override;
+  void DangerousDownloadValidated(content::WebContents* web_contents,
+                                  const std::string& download_guid,
+                                  bool accept) override;
+
+  // DownloadItem::Observer interface.
+  void OnDownloadUpdated(content::DownloadItem* item) override;
+
+  void StartAndroidDownload(int render_process_id,
+                            int render_view_id,
+                            bool must_download,
+                            const DownloadInfo& info);
+  void StartAndroidDownloadInternal(int render_process_id,
+                                    int render_view_id,
+                                    bool must_download,
+                                    const DownloadInfo& info,
+                                    bool allowed);
+
+  // The download item contains dangerous file types.
+  void OnDangerousDownload(content::DownloadItem *item);
+
+  base::android::ScopedJavaLocalRef<jobject> GetContentViewCoreFromWebContents(
+      content::WebContents* web_contents);
+
+  // Creates Java object if it is not created already and returns it.
+  JavaObject* GetJavaObject();
+
+  JavaObject* java_object_;
+
+  std::string default_file_name_;
+
+  DISALLOW_COPY_AND_ASSIGN(DownloadController);
+};
+
+#endif  // CHROME_BROWSER_ANDROID_DOWNLOAD_DOWNLOAD_CONTROLLER_H_