[fsp] First part of support for reading files.

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 582bc7dd79a13b9cf7ecefeef7908bea74230bcb..f63cc0e9feec13edc1ff1558d0e6f9ab4ddaee1d 100644
--- a/chrome/common/extensions/api/file_system_provider_internal.idl
+++ b/chrome/common/extensions/api/file_system_provider_internal.idl
@@ -74,6 +74,21 @@ namespace fileSystemProviderInternal {
         long fileSystemId,
         long requestId,
         fileSystemProvider.ProviderError error);
+
+    // Internal. Success callback of the <code>onReadFileRequested</code>
+    // event. Can be called multiple times per request.
+    static void readFileRequestedSuccess(
+        long fileSystemId,
+        long requestId,
+        DOMString data,
+        boolean hasNext);
+
+    // Internal. Error callback of the <code>onReadFileRequested</code>
+    // event. Must be called when reading a file fails.
+    static void readFileRequestedError(
+        long fileSystemId,
+        long requestId,
+        fileSystemProvider.ProviderError error);
   };
 };