Add resource ID based download requests in {GDataWapi/Drive} requests.

chrome/browser/google_apis/gdata_wapi_requests.cc

Index: chrome/browser/google_apis/gdata_wapi_requests.cc
diff --git a/chrome/browser/google_apis/gdata_wapi_requests.cc b/chrome/browser/google_apis/gdata_wapi_requests.cc
index 4f562cfec071e178736d9cb5445faae200c3cab8..eb38afa8588f8674f11aa3feb2b3d3d1087ee23d 100644
--- a/chrome/browser/google_apis/gdata_wapi_requests.cc
+++ b/chrome/browser/google_apis/gdata_wapi_requests.cc
@@ -711,4 +711,27 @@ void GetUploadStatusRequest::OnRangeRequestComplete(
   callback_.Run(response, ParseResourceEntry(value.Pass()));
 }
 
+
+//========================== DownloadFileRequest ==========================
+
+DownloadFileRequest::DownloadFileRequest(
+    RequestSender* sender,
+    const GDataWapiUrlGenerator& url_generator,
+    const DownloadActionCallback& download_action_callback,
+    const GetContentCallback& get_content_callback,
+    const ProgressCallback& progress_callback,
+    const std::string& resource_id,
+    const base::FilePath& output_file_path)
+    : DownloadFileRequestBase(
+          sender,
+          download_action_callback,
+          get_content_callback,
+          progress_callback,
+          url_generator.GenerateDownloadFileUrl(resource_id),
+          output_file_path) {
+}
+
+DownloadFileRequest::~DownloadFileRequest() {
+}
+
 }  // namespace google_apis