commit 3e126191c1a7a022260c1072b1b9288f09bb2dce
author Ken Rockot <rockot@chromium.org> Tue Jul 10 22:39:51 2018
committer Commit Bot <commit-bot@chromium.org> Tue Jul 10 22:39:51 2018
tree 4ba535ea0821bb7dd83f1fb8ca54c90b87f48a78
parent ec61662d85a62c81c48dca04e4a6f2ba599967c0

Use BigBuffer for legacy IPC messages

This replaces use of ReadOnlyBuffer with a new mojom Message type
specific to //ipc. This type maps to another new C++ MessageView type
which in turn wraps a BigBufferView.

This allows us to transparently fall back onto shared memory for large
IPC messages without increasing the number of copies during send or
receive in any (small- or large-message) cases.

In order to avoid introducing more mojo-base targets, this also removes
the remaining [Native] structs from mojo_base mojom (LOGFONT and
FileInfo) and replaces them with real mojom structures + StructTraits,
thus allowing //ipc to depend on mojo/public/*/base in its entirety.

Also fixes random missing public_deps entries for a
chrome/services/file_util typemap, because it decided to start breaking
all of my local builds. :3

Bug: 784069
Change-Id: I359b964ffc1fe44ffd6aa704405ea63156f4fbc9
Reviewed-on: https://chromium-review.googlesource.com/1131685
Commit-Queue: Ken Rockot <rockot@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#573956}