Move ipc/ to use new base::Pickle functionality

This adjusts to how the new Pickle code is structured internally,
stopping use of a deprecated constructor so that it can be removed.

Bug: 330028190
Change-Id: Ia71114f42d07dd972c67772b7d33615b776e50ca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5383055
Auto-Submit: Avi Drissman <[email protected]>
Reviewed-by: John Abd-El-Malek <[email protected]>
Commit-Queue: Avi Drissman <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1276492}

ipc/ipc_message.cc

@@ -9,7 +9,9 @@
 #include <stdint.h>
 
 #include "base/atomic_sequence_num.h"
+#include "base/containers/span.h"
 #include "base/logging.h"
+#include "base/pickle.h"
 #include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
 #include "ipc/ipc_message_attachment.h"
@@ -71,7 +73,8 @@ Message::Message(int32_t routing_id, uint32_t type, PriorityValue priority)
 }
 
 Message::Message(const char* data, size_t data_len)
-    : base::Pickle(data, data_len) {
+    : base::Pickle(base::Pickle::kUnownedData,
+                   base::as_bytes(base::span(data, data_len))) {
   Init();
 }