Reduce boilerplate when creating simple mojom::URLLoaders.

media/mojo/common/mojo_decoder_buffer_converter.cc

Index: media/mojo/common/mojo_decoder_buffer_converter.cc
diff --git a/media/mojo/common/mojo_decoder_buffer_converter.cc b/media/mojo/common/mojo_decoder_buffer_converter.cc
index d47e5f56a67644b34719a05660029b385dd34a8a..91fcbf8bb9c52661503bfdea8ca60615ff3a0708 100644
--- a/media/mojo/common/mojo_decoder_buffer_converter.cc
+++ b/media/mojo/common/mojo_decoder_buffer_converter.cc
@@ -20,26 +20,23 @@ namespace media {
 namespace {
 
 std::unique_ptr<mojo::DataPipe> CreateDataPipe(DemuxerStream::Type type) {
-  MojoCreateDataPipeOptions options;
-  options.struct_size = sizeof(MojoCreateDataPipeOptions);
-  options.flags = MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE;
-  options.element_num_bytes = 1;
+  uint32_t capacity = 0;
 
   if (type == DemuxerStream::AUDIO) {
     // TODO(timav): Consider capacity calculation based on AudioDecoderConfig.
-    options.capacity_num_bytes = 512 * 1024;
+    capacity = 512 * 1024;
   } else if (type == DemuxerStream::VIDEO) {
     // Video can get quite large; at 4K, VP9 delivers packets which are ~1MB in
     // size; so allow for some head room.
     // TODO(xhwang, sandersd): Provide a better way to customize this value.
-    options.capacity_num_bytes = 2 * (1024 * 1024);
+    capacity = 2 * (1024 * 1024);
   } else {
     NOTREACHED() << "Unsupported type: " << type;
     // Choose an arbitrary size.
-    options.capacity_num_bytes = 512 * 1024;
+    capacity = 512 * 1024;
   }
 
-  return base::MakeUnique<mojo::DataPipe>(options);
+  return base::MakeUnique<mojo::DataPipe>(capacity);
 }
 
 bool IsPipeReadWriteError(MojoResult result) {