Change throwing String to throwing ApiRequestError

lib/src/apis_package_generator.dart

 part of discovery_api_client_generator;
 
 /// Generates a dart package with all APIs given in the constructor.
 ///
 /// This class generates a dart package with the following layout:
 /// $packageFolderPath
 ///   |- .gitignore
 ///   |- pubspec.yaml
 ///   |- LICENSE
 ///   |- README.md
@@ skipping 833 matching lines @@
           var end = lastChunk.endOfChunk;
 
           // Validate that we have the correct number of bytes if length was
           // specified.
           if (_uploadMedia.length != null) {
             if (end < _uploadMedia.length) {
               completer.completeError(new common_external.ApiRequestError(
                   'Received less bytes than indicated by [Media.length].'));
               return;
             } else if (end > _uploadMedia.length) {
-              completer.completeError(
+              completer.completeError(new common_external.ApiRequestError(
                   'Received more bytes than indicated by [Media.length].');
               return;
             }
           }
 
           // Upload last chunk and *do not drain the response* but complete
           // with it.
           _uploadChunkResumable(uploadUri, lastChunk, lastChunk: true)
               .then((response) {
             completer.complete(response);
@@ skipping 1346 matching lines @@
         requester.request('s/foo/a1/a2/bar/s1/e', 'GET')
             .then(expectAsync((response) {
           expect(response, isNull);
         }));
       });
     });
   });
 }
 """;
 }