Files.app: Add an private API to get a download URL

chrome/browser/chromeos/extensions/file_manager/private_api_drive.h

 // Copyright 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.
 //
 // This file provides Drive specific API functions.
 
 #ifndef CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_DRIVE_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_DRIVE_H_
 
 #include "chrome/browser/chromeos/drive/file_errors.h"
 #include "chrome/browser/chromeos/drive/file_system_interface.h"
 #include "chrome/browser/chromeos/extensions/file_manager/private_api_base.h"
 #include "chrome/browser/chromeos/file_manager/fileapi_util.h"
 
 namespace drive {
 class FileCacheEntry;
 class ResourceEntry;
 struct SearchResultInfo;
 }
 
+namespace google_apis {
+class AuthService;
+}
+
 namespace extensions {
 
 namespace api {
 namespace file_browser_private {
 struct DriveEntryProperties;
 }  // namespace file_browser_private
 }  // namespace api
 
 // Retrieves property information for an entry and returns it as a dictionary.
 // On error, returns a dictionary with the key "error" set to the error number
@@ skipping 202 matching lines @@
 
  protected:
   virtual ~FileBrowserPrivateRequestDriveShareFunction() {}
   virtual bool RunAsync() OVERRIDE;
 
  private:
   // Called back after the drive file system operation is finished.
   void OnAddPermission(drive::FileError error);
 };
 
+// Implements the chrome.fileBrowserPrivate.getDownloadUrl method.
+class FileBrowserPrivateGetDownloadUrlFunction
+    : public LoggedAsyncExtensionFunction {
+ public:
+  FileBrowserPrivateGetDownloadUrlFunction();
+
+  DECLARE_EXTENSION_FUNCTION("fileBrowserPrivate.getDownloadUrl",
+                             FILEBROWSERPRIVATE_GETDOWNLOADURL)
+
+ protected:
+  virtual ~FileBrowserPrivateGetDownloadUrlFunction();
+
+  // AsyncExtensionFunction overrides.
+  virtual bool RunAsync() OVERRIDE;
+
+  void OnGetResourceEntry(drive::FileError error,
+                          scoped_ptr<drive::ResourceEntry> entry);
+
+  // Callback with an |access_token|, called by
+  // drive::DriveReadonlyTokenFetcher.
+  void OnTokenFetched(google_apis::GDataErrorCode code,
+                      const std::string& access_token);
+
+ private:
+  std::string download_url_;
+  scoped_ptr<google_apis::AuthService> auth_service_;
+};
+
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_DRIVE_H_