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rockot authored
This changes consumers of IPC::Message to generally refer refer to base::Pickle instead when performing serialization and deserialization operations. The few specific instances where the IPC::Message interface (Read/WriteAttachent) is needed can safely be static_cast'd, as IPC::Message is the only public subclass of base::Pickle. The purpose of this change is to facilitate the transition to Mojo IPC, as we've trained the Mojo bindings layer to use existing ParamTraits<T> parameterized over base::Pickle. To support this base::Pickle has had some stub interfaces added for WriteAttachment and ReadAttachment, along with a Pickle::Attachment. A follow-up patch will add sizing traits to the standard IPC_STRUCT macros, enabling the majority of Chrome IPC structs to be carried over Mojo message pipes as-is. BUG=577685 R=jam@chromium.org Review URL: https://codereview.chromium.org/1659003003 Cr-Commit-Position: refs/heads/master@{#373323}
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