[base] Apply BindOnceRewriter in //ipc

This change applies the BindOnceRewriter in //ipc.
This rewriter replaces calls to base::Bind and base::BindRepeating with
calls to base::BindOnce, in case the result is immediately assigned to a
base::OnceCallback. Given that base::RepeatingCallback is implicitly
convertible to base::OnceCallback, there is no change in functionality.

Steps:
  1. run_tool.py --tool base_bind_rewriters \
                 --tool-arg='--rewriter=bind_to_bind_once'
  2. git cl format

This CL was uploaded by git cl split.

R=jam@chromium.org

Bug: 714018
Change-Id: I323ecd822f7dbf4eefdf4cabf29a39d21d2e0ffa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2132260
Auto-Submit: Jan Wilken Dörrie <jdoerrie@chromium.org>
Commit-Queue: Ken Rockot <rockot@google.com>
Reviewed-by: Ken Rockot <rockot@google.com>
Cr-Commit-Position: refs/heads/master@{#761106}

ipc/ipc_message_pipe_reader.cc

@@ -29,12 +29,12 @@ MessagePipeReader::MessagePipeReader(
     : delegate_(delegate),
       sender_(std::move(sender)),
       receiver_(this, std::move(receiver)) {
-  sender_.set_disconnect_handler(base::BindRepeating(
-      &MessagePipeReader::OnPipeError, base::Unretained(this),
-      MOJO_RESULT_FAILED_PRECONDITION));
-  receiver_.set_disconnect_handler(base::BindRepeating(
-      &MessagePipeReader::OnPipeError, base::Unretained(this),
-      MOJO_RESULT_FAILED_PRECONDITION));
+  sender_.set_disconnect_handler(
+      base::BindOnce(&MessagePipeReader::OnPipeError, base::Unretained(this),
+                     MOJO_RESULT_FAILED_PRECONDITION));
+  receiver_.set_disconnect_handler(
+      base::BindOnce(&MessagePipeReader::OnPipeError, base::Unretained(this),
+                     MOJO_RESULT_FAILED_PRECONDITION));
 }
 
 MessagePipeReader::~MessagePipeReader() {

ipc/ipc_mojo_bootstrap.cc

@@ -170,8 +170,8 @@ class ChannelAssociatedGroupController
         task_runner_));
     connector_->set_incoming_receiver(&dispatcher_);
     connector_->set_connection_error_handler(
-        base::BindRepeating(&ChannelAssociatedGroupController::OnPipeError,
-                            base::Unretained(this)));
+        base::BindOnce(&ChannelAssociatedGroupController::OnPipeError,
+                       base::Unretained(this)));
     connector_->set_enforce_errors_from_incoming_receiver(false);
     connector_->SetWatcherHeapProfilerTag("IPC Channel");
     if (quota_checker_)