Tag some of Mojo heap allocations for the heap profiler.

ipc/ipc_sync_channel.cc

 // Copyright (c) 2012 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 "ipc/ipc_sync_channel.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
@@ skipping 507 matching lines @@
     WaitableEvent* shutdown_event) {
   return base::WrapUnique(
       new SyncChannel(listener, ipc_task_runner, shutdown_event));
 }
 
 SyncChannel::SyncChannel(
     Listener* listener,
     const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner,
     WaitableEvent* shutdown_event)
     : ChannelProxy(new SyncContext(listener, ipc_task_runner, shutdown_event)),
-      sync_handle_registry_(mojo::SyncHandleRegistry::current()) {
+      sync_handle_registry_(mojo::SyncHandleRegistry::current()),
+      dispatch_watcher_(FROM_HERE) {
   // The current (listener) thread must be distinct from the IPC thread, or else
   // sending synchronous messages will deadlock.
   DCHECK_NE(ipc_task_runner.get(), base::ThreadTaskRunnerHandle::Get().get());
   StartWatching();
 }
 
 SyncChannel::~SyncChannel() {
 }
 
 void SyncChannel::SetRestrictDispatchChannelGroup(int group) {
@@ skipping 95 matching lines @@
     }
 
     if (should_pump_messages)
       WaitForReplyWithNestedMessageLoop(context);  // Run a nested message loop.
 
     break;
   }
 }
 
 void SyncChannel::WaitForReplyWithNestedMessageLoop(SyncContext* context) {
-  mojo::Watcher send_done_watcher;
+  mojo::Watcher send_done_watcher(FROM_HERE);
 
   ReceivedSyncMsgQueue* sync_msg_queue = context->received_sync_msgs();
   DCHECK_NE(sync_msg_queue, nullptr);
 
   mojo::Watcher* old_watcher = sync_msg_queue->top_send_done_watcher();
   mojo::Handle old_handle(mojo::kInvalidHandleValue);
   mojo::Watcher::ReadyCallback old_callback;
 
   // Maintain a thread-local stack of watchers to ensure nested calls complete
   // in the correct sequence, i.e. the outermost call completes first, etc.
@@ skipping 37 matching lines @@
                           MOJO_HANDLE_SIGNAL_READABLE,
                           base::Bind(&SyncChannel::OnDispatchHandleReady,
                                      base::Unretained(this)));
 }
 
 void SyncChannel::OnChannelInit() {
   pre_init_sync_message_filters_.clear();
 }
 
 }  // namespace IPC