[fsp] Add the getMetadata operation.

chrome/common/extensions/api/file_system_provider_internal.idl

Index: chrome/common/extensions/api/file_system_provider_internal.idl
diff --git a/chrome/common/extensions/api/file_system_provider_internal.idl b/chrome/common/extensions/api/file_system_provider_internal.idl
index 80757bd699bb0a04eeaabfbfd7b6b83a5f301f62..30ebbc7ea78b1ff4d2549e78f4b59bfdcbc078eb 100644
--- a/chrome/common/extensions/api/file_system_provider_internal.idl
+++ b/chrome/common/extensions/api/file_system_provider_internal.idl
@@ -19,6 +19,20 @@ namespace fileSystemProviderInternal {
         long fileSystemId,
         long requestId,
         fileSystemProvider.ProviderError error);
+
+    // Internal. Success callback of the <code>onGetMetadataRequested</code>
+    // event. Must be called if metadata is available.
+    static void getMetadataRequestedSuccess(
+        long fileSystemId,
+        long requestId,
+        fileSystemProvider.EntryMetadata metadata);
+
+    // Internal. Error callback of the <code>onGetMetadataRequested</code>
+    // event. Must be called when obtaining metadata fails.
+    static void getMetadataRequestedError(
+        long fileSystemId,
+        long requestId,
+        fileSystemProvider.ProviderError error);
   };
 };