Have all trace points emit to ETW.

base/win/event_trace_provider.h

 // Copyright (c) 2011 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.
 //
 // Declaration of a Windows event trace provider class, to allow using
 // Windows Event Tracing for logging transport and control.
 #ifndef BASE_WIN_EVENT_TRACE_PROVIDER_H_
 #define BASE_WIN_EVENT_TRACE_PROVIDER_H_
 
 #include <windows.h>
@@ skipping 25 matching lines @@
 
   // Clang and the C++ standard don't allow unqualified lookup into dependent
   // bases, hence these using decls to explicitly pull the names out.
   using EtwMofEventBase<N>::header;
   using EtwMofEventBase<N>::fields;
 
   EtwMofEvent() {
     memset(static_cast<Super*>(this), 0, sizeof(Super));
   }
 
+  EtwMofEvent(const EtwEventClass& event_class, EtwEventLevel level) {
+    memset(static_cast<Super*>(this), 0, sizeof(Super));
+    header.Size = sizeof(Super);
+    header.Guid = event_class;
+    header.Class.Level = level;
+    header.Flags = WNODE_FLAG_TRACED_GUID | WNODE_FLAG_USE_MOF_PTR;
+  }
+
   EtwMofEvent(const EtwEventClass& event_class, EtwEventType type,
               EtwEventLevel level) {
     memset(static_cast<Super*>(this), 0, sizeof(Super));
     header.Size = sizeof(Super);
     header.Guid = event_class;
     header.Class.Type = type;
     header.Class.Level = level;
     header.Flags = WNODE_FLAG_TRACED_GUID | WNODE_FLAG_USE_MOF_PTR;
   }
 
   EtwMofEvent(const EtwEventClass& event_class, EtwEventType type,
               EtwEventVersion version, EtwEventLevel level) {
     memset(static_cast<Super*>(this), 0, sizeof(Super));
     header.Size = sizeof(Super);
     header.Guid = event_class;
     header.Class.Type = type;
     header.Class.Version = version;
     header.Class.Level = level;
     header.Flags = WNODE_FLAG_TRACED_GUID | WNODE_FLAG_USE_MOF_PTR;
   }
 
+  void SetType(EtwEventType type) {
+    header.Class.Type = type;
+  }
+
   void SetField(int field, size_t size, const void *data) {
     // DCHECK(field < N);
     if ((field < N) && (size <= kuint32max)) {
       fields[field].DataPtr = reinterpret_cast<ULONG64>(data);
       fields[field].Length = static_cast<ULONG>(size);
     }
   }
 
   EVENT_TRACE_HEADER* get() { return& header; }
 
@@ skipping 94 matching lines @@
   // RegisterTraceGuids. Non-const, because that's how the API needs it.
   static TRACE_GUID_REGISTRATION obligatory_guid_registration_;
 
   DISALLOW_COPY_AND_ASSIGN(EtwTraceProvider);
 };
 
 }  // namespace win
 }  // namespace base
 
 #endif  // BASE_WIN_EVENT_TRACE_PROVIDER_H_