SyncFS: Add resource type field into DriveMetadata

BUG=231273
TEST=pass all existing tests

Review URL: https://codereview.chromium.org/13929012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@194552 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/sync_file_system/drive_file_sync_service.cc

@@ -1245,6 +1245,7 @@ void DriveFileSyncService::DidUploadNewFileForLocalSync(
     param->drive_metadata.set_md5_checksum(file_md5);
     param->drive_metadata.set_conflicted(false);
     param->drive_metadata.set_to_be_fetched(false);
+    param->drive_metadata.set_type(DriveMetadata::RESOURCE_TYPE_FILE);
     const DriveMetadata& metadata = param->drive_metadata;
     metadata_store_->UpdateEntry(
         url, metadata,
@@ -1274,6 +1275,7 @@ void DriveFileSyncService::DidUploadExistingFileForLocalSync(
       param->drive_metadata.set_md5_checksum(file_md5);
       param->drive_metadata.set_conflicted(false);
       param->drive_metadata.set_to_be_fetched(false);
+      param->drive_metadata.set_type(DriveMetadata::RESOURCE_TYPE_FILE);
       const DriveMetadata& metadata = param->drive_metadata;
       metadata_store_->UpdateEntry(
           url, metadata,

chrome/browser/sync_file_system/sync_file_system.proto

@@ -18,4 +18,11 @@ message DriveMetadata {
   // When true, indicates that the remote file identified by |resource_id|
   // should be fetched for solving the conflict (resolve-to-remote resolution).
   required bool to_be_fetched = 4;
+
+  enum ResourceType {
+    RESOURCE_TYPE_FILE = 0;
+    RESOURCE_TYPE_FOLDER = 1;
+  }
+
+  optional ResourceType type = 5 [default = RESOURCE_TYPE_FILE];
 }