[tracing] Fix MemoryDumpManager to support startup tracing

components/tracing/child_memory_dump_manager_delegate_impl.cc

Index: components/tracing/child_memory_dump_manager_delegate_impl.cc
diff --git a/components/tracing/child_memory_dump_manager_delegate_impl.cc b/components/tracing/child_memory_dump_manager_delegate_impl.cc
index 9222def6254676f760841a6afa3af2392b0e8ff3..89ea3215c6a5268745a25c1ee3434166c1218c5b 100644
--- a/components/tracing/child_memory_dump_manager_delegate_impl.cc
+++ b/components/tracing/child_memory_dump_manager_delegate_impl.cc
@@ -21,11 +21,11 @@ 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(
+      false /* is_coordinator */, this /* delegate */);
 }
 
-ChildMemoryDumpManagerDelegateImpl::~ChildMemoryDumpManagerDelegateImpl() {
-}
+ChildMemoryDumpManagerDelegateImpl::~ChildMemoryDumpManagerDelegateImpl() {}
 
 void ChildMemoryDumpManagerDelegateImpl::SetChildTraceMessageFilter(
     ChildTraceMessageFilter* ctmf) {
@@ -70,10 +70,6 @@ void ChildMemoryDumpManagerDelegateImpl::RequestGlobalMemoryDump(
   ctmf_->SendGlobalMemoryDumpRequest(args, callback);
 }
 
-bool ChildMemoryDumpManagerDelegateImpl::IsCoordinatorProcess() const {
-  return false;
-}
-
 uint64 ChildMemoryDumpManagerDelegateImpl::GetTracingProcessId() const {
   return tracing_process_id_;
 }