Move DownloadFileOperation to base_operations.

chrome/browser/google_apis/base_operations.h

Index: chrome/browser/google_apis/base_operations.h
diff --git a/chrome/browser/google_apis/base_operations.h b/chrome/browser/google_apis/base_operations.h
index e2cc58300515531c529e8c96818a795479d6d3ca..c5adfb38fbce0f2253e815c66fb22c1ee9f300d8 100644
--- a/chrome/browser/google_apis/base_operations.h
+++ b/chrome/browser/google_apis/base_operations.h
@@ -258,6 +258,65 @@ class GetDataOperation : public UrlFetchOperationBase {
   DISALLOW_COPY_AND_ASSIGN(GetDataOperation);
 };
 
+//============================ DownloadFileOperation ===========================
+
+// Callback type for DownloadHostedDocument/DownloadFile
+// DocumentServiceInterface calls.
+typedef base::Callback<void(GDataErrorCode error,
+                            const FilePath& temp_file)> DownloadActionCallback;
+
+// This class performs the operation for downloading of a given document/file.
+class DownloadFileOperation : public UrlFetchOperationBase {
+ public:
+  // download_action_callback:
+  //   This callback is called when the download is complete. Must not be null.
+  //
+  // get_content_callback:
+  //   This callback is called when some part of the content is
+  //   read. Used to read the download content progressively. May be null.
+  //
+  // download_url:
+  //   Specifies the target file to download.
+  //
+  // drive_file_path:
+  //   Specifies the drive path of the target file. Shown in UI.
+  //   TODO(satorux): Remove the drive file path hack. crbug.com/163296
+  //
+  // output_file_path:
+  //   Specifies the file path to save the downloaded file.
+  //
+  DownloadFileOperation(
+      OperationRegistry* registry,
+      net::URLRequestContextGetter* url_request_context_getter,
+      const DownloadActionCallback& download_action_callback,
+      const GetContentCallback& get_content_callback,
+      const GURL& download_url,
+      const FilePath& drive_file_path,
+      const FilePath& output_file_path);
+  virtual ~DownloadFileOperation();
+
+ protected:
+  // UrlFetchOperationBase overrides.
+  virtual GURL GetURL() const OVERRIDE;
+  virtual void ProcessURLFetchResults(const net::URLFetcher* source) OVERRIDE;
+  virtual void RunCallbackOnPrematureFailure(GDataErrorCode code) OVERRIDE;
+
+  // net::URLFetcherDelegate overrides.
+  virtual void OnURLFetchDownloadProgress(const net::URLFetcher* source,
+                                          int64 current, int64 total) OVERRIDE;
+  virtual bool ShouldSendDownloadData() OVERRIDE;
+  virtual void OnURLFetchDownloadData(
+      const net::URLFetcher* source,
+      scoped_ptr<std::string> download_data) OVERRIDE;
+
+ private:
+  const DownloadActionCallback download_action_callback_;
+  const GetContentCallback get_content_callback_;
+  const GURL download_url_;
+
+  DISALLOW_COPY_AND_ASSIGN(DownloadFileOperation);
+};
+
 }  // namespace google_apis
 
 #endif  // CHROME_BROWSER_GOOGLE_APIS_BASE_OPERATIONS_H_