Add OOP memory logging allocator shim

chrome/common/profiling/memlog_sender.cc

Index: chrome/common/profiling/memlog_sender.cc
diff --git a/chrome/common/profiling/memlog_sender.cc b/chrome/common/profiling/memlog_sender.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4b3160b7261d8962fc636fae4852387684bc1325
--- /dev/null
+++ b/chrome/common/profiling/memlog_sender.cc
@@ -0,0 +1,32 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/common/profiling/memlog_sender.h"
+
+#include "base/command_line.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/profiling/memlog_allocator_shim.h"
+#include "chrome/common/profiling/memlog_sender_pipe.h"
+#include "chrome/common/profiling/memlog_stream.h"
+
+namespace profiling {
+
+void InitMemlogSenderIfNecessary(const base::CommandLine& cmdline) {
+  base::CommandLine::StringType pipe_id =
+      cmdline.GetSwitchValueNative(switches::kMemlogPipe);
+  if (pipe_id.empty())
+    return;  // No pipe, don't run.
+
+  static MemlogSenderPipe pipe(pipe_id);
+  pipe.Connect();
+
+  StreamHeader header;
+  header.signature = kStreamSignature;
+
+  pipe.Send(&header, sizeof(StreamHeader));
+
+  InitAllocatorShim(&pipe);
+}
+
+}  // namespace profiling