Do not return FileSystem contents if the profile is in incognito mode.

webkit/browser/fileapi/file_system_url_request_job.cc

Index: webkit/browser/fileapi/file_system_url_request_job.cc
diff --git a/webkit/browser/fileapi/file_system_url_request_job.cc b/webkit/browser/fileapi/file_system_url_request_job.cc
index d93c14089f24218d9806ba54f202cfec8a922158..7d1f86131384e33c370e5b89db51ae17e47cac76 100644
--- a/webkit/browser/fileapi/file_system_url_request_job.cc
+++ b/webkit/browser/fileapi/file_system_url_request_job.cc
@@ -157,6 +157,11 @@ void FileSystemURLRequestJob::StartAsync() {
     return;
   DCHECK(!reader_.get());
   url_ = file_system_context_->CrackURL(request_->url());
+  if (!file_system_context_->CanServeURLRequest(url_)) {
+    // In incognito mode the API is not usable and there should be no data.
+    NotifyFailed(net::ERR_FILE_NOT_FOUND);
+    return;
+  }
   file_system_context_->operation_runner()->GetMetadata(
       url_,
       base::Bind(&FileSystemURLRequestJob::DidGetMetadata,