Google OAuth Device Flow support for FNL

mojo/data_pipe_utils/data_pipe_utils.cc

Index: mojo/data_pipe_utils/data_pipe_utils.cc
diff --git a/mojo/data_pipe_utils/data_pipe_utils.cc b/mojo/data_pipe_utils/data_pipe_utils.cc
index e7e1df4055994a21a35d9aa48fc51251f209f25e..1084db30a9fd1d068b36389f63c60c2978846e87 100644
--- a/mojo/data_pipe_utils/data_pipe_utils.cc
+++ b/mojo/data_pipe_utils/data_pipe_utils.cc
@@ -112,5 +112,18 @@ bool BlockingCopyFromString(const std::string& source,
   }
 }
 
+ScopedDataPipeConsumerHandle WriteStringToConsumerHandle(
+    const std::string& source) {
+  TRACE_EVENT0("data_pipe_utils", "WriteStringToConsumerHandle");
+  static const size_t max_buffer_size = 2 * 1024 * 1024;  // 2MB
+  CHECK_LE(static_cast<uint32_t>(source.size()), max_buffer_size);
+  MojoCreateDataPipeOptions options = {sizeof(MojoCreateDataPipeOptions),
+                                       MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE,
+                                       1, source.size()};
+  DataPipe pipe(options);
+  BlockingCopyFromString(source, pipe.producer_handle.Pass());
+  return pipe.consumer_handle.Pass();
+}
+
 }  // namespace common
 }  // namespace mojo