[tracing] Fix MemoryDumpManager to support startup tracing

content/browser/tracing/tracing_controller_impl.cc

Index: content/browser/tracing/tracing_controller_impl.cc
diff --git a/content/browser/tracing/tracing_controller_impl.cc b/content/browser/tracing/tracing_controller_impl.cc
index d69cab97c67ff019d590ba34dc0cb10e7a167613..8fc3641a7c3572ea3a610c5c916d6ff85dbffaa2 100644
--- a/content/browser/tracing/tracing_controller_impl.cc
+++ b/content/browser/tracing/tracing_controller_impl.cc
@@ -59,7 +59,8 @@ TracingControllerImpl::TracingControllerImpl()
       is_recording_(TraceLog::GetInstance()->IsEnabled()),
       is_monitoring_(false),
       is_power_tracing_(false) {
-  base::trace_event::MemoryDumpManager::GetInstance()->SetDelegate(this);
+  base::trace_event::MemoryDumpManager::GetInstance()->Initialize(
+      true /* is_coordinator */, this /* delegate */);
 
   // Deliberately leaked, like this class.
   base::FileTracing::SetProvider(new FileTracingProviderImpl);
@@ -846,10 +847,6 @@ void TracingControllerImpl::RequestGlobalMemoryDump(
     tmf->SendProcessMemoryDumpRequest(args);
 }
 
-bool TracingControllerImpl::IsCoordinatorProcess() const {
-  return true;
-}
-
 uint64 TracingControllerImpl::GetTracingProcessId() const {
   return ChildProcessHost::kBrowserTracingProcessId;
 }