drive: Support authorizing third-party Drive apps for opening files.

google_apis/drive/drive_api_requests.cc

Index: google_apis/drive/drive_api_requests.cc
diff --git a/google_apis/drive/drive_api_requests.cc b/google_apis/drive/drive_api_requests.cc
index 79ef01a34430fc07e8d992d44205b3696976572e..ae5b54f927861ac46e8d2377add874fcdc025e91 100644
--- a/google_apis/drive/drive_api_requests.cc
+++ b/google_apis/drive/drive_api_requests.cc
@@ -153,6 +153,29 @@ GURL FilesGetRequest::GetURLInternal() const {
   return url_generator_.GetFilesGetUrl(file_id_);
 }
 
+//============================ FilesAuthorizeRequest ===========================
+
+FilesAuthorizeRequest::FilesAuthorizeRequest(
+    RequestSender* sender,
+    const DriveApiUrlGenerator& url_generator,
+    const FileResourceCallback& callback)
+    : DriveApiDataRequest(
+          sender,
+          base::Bind(&ParseJsonAndRun<FileResource>, callback)),
+      url_generator_(url_generator) {
+  DCHECK(!callback.is_null());
+}
+
+FilesAuthorizeRequest::~FilesAuthorizeRequest() {}
+
+net::URLFetcher::RequestType FilesAuthorizeRequest::GetRequestType() const {
+  return net::URLFetcher::POST;
+}
+
+GURL FilesAuthorizeRequest::GetURLInternal() const {
+  return url_generator_.GetFilesAuthorizeUrl(file_id_, app_id_);
+}
+
 //============================ FilesInsertRequest ============================
 
 FilesInsertRequest::FilesInsertRequest(