[tracing] Fix MemoryDumpManager to support startup tracing

components/tracing/child_memory_dump_manager_delegate_impl.cc

 // Copyright 2015 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 "components/tracing/child_memory_dump_manager_delegate_impl.h"
 
 #include "base/single_thread_task_runner.h"
 #include "components/tracing/child_trace_message_filter.h"
 
 namespace tracing {
 
 // static
 ChildMemoryDumpManagerDelegateImpl*
 ChildMemoryDumpManagerDelegateImpl::GetInstance() {
   return Singleton<
       ChildMemoryDumpManagerDelegateImpl,
       LeakySingletonTraits<ChildMemoryDumpManagerDelegateImpl>>::get();
 }
 
 ChildMemoryDumpManagerDelegateImpl::ChildMemoryDumpManagerDelegateImpl()
     : ctmf_(nullptr),
       tracing_process_id_(
           base::trace_event::MemoryDumpManager::kInvalidTracingProcessId) {
-  base::trace_event::MemoryDumpManager::GetInstance()->SetDelegate(this);
+  base::trace_event::MemoryDumpManager::GetInstance()->Initialize(
+      this /* delegate */, false /* is_coordinator */);
 }
 
-ChildMemoryDumpManagerDelegateImpl::~ChildMemoryDumpManagerDelegateImpl() {
-}
+ChildMemoryDumpManagerDelegateImpl::~ChildMemoryDumpManagerDelegateImpl() {}
 
 void ChildMemoryDumpManagerDelegateImpl::SetChildTraceMessageFilter(
     ChildTraceMessageFilter* ctmf) {
   // Check that we are either registering the CTMF or tearing it down, but not
   // replacing a valid instance with another one (should never happen).
   DCHECK(ctmf_ == nullptr || (ctmf == nullptr && ctmf_task_runner_ != nullptr));
   ctmf_ = ctmf;
   ctmf_task_runner_ = ctmf ? (ctmf->ipc_task_runner()) : nullptr;
 }
 
@@ skipping 24 matching lines @@
   if (!ctmf_) {
     if (!callback.is_null())
       callback.Run(args.dump_guid, false /* success */);
     return;
   }
 
   // Send the request up to the browser process' MessageDumpmanager.
   ctmf_->SendGlobalMemoryDumpRequest(args, callback);
 }
 
-bool ChildMemoryDumpManagerDelegateImpl::IsCoordinatorProcess() const {
-  return false;
-}
-
 uint64 ChildMemoryDumpManagerDelegateImpl::GetTracingProcessId() const {
   return tracing_process_id_;
 }
 
 }  // namespace tracing