Roll Chrome into Mojo.

base/debug/trace_event_win.h

 // 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.
 
-// This file contains the Windows-specific declarations for trace_event.h.
+// In the process of moving the trace event files. Right now the headers
+// are being forwarded. In next CLs the change will get completed
+// TODO(ssid): https://code.google.com/p/chromium/issues/detail?id=451032
+
 #ifndef BASE_DEBUG_TRACE_EVENT_WIN_H_
 #define BASE_DEBUG_TRACE_EVENT_WIN_H_
 
-#include <string>
-
-#include "base/base_export.h"
-#include "base/debug/trace_event.h"
-#include "base/win/event_trace_provider.h"
-
-// Fwd.
-template <typename Type>
-struct StaticMemorySingletonTraits;
-
-namespace base {
-namespace debug {
-
-// This EtwTraceProvider subclass implements ETW logging
-// for the macros above on Windows.
-class BASE_EXPORT TraceEventETWProvider : public base::win::EtwTraceProvider {
- public:
-   static const size_t kUseStrlen = static_cast<size_t>(-1);
-
-  // Start logging trace events.
-  // This is a noop in this implementation.
-  static bool StartTracing();
-
-  // Trace begin/end/instant events, this is the bottleneck implementation
-  // all the others defer to.
-  // Allowing the use of std::string for name or extra is a convenience,
-  // whereas passing name or extra as a const char* avoids the construction
-  // of temporary std::string instances.
-  // If kUseStrlen is passed for name_len or extra_len, the strlen of the string
-  // will be used for length.
-  static void Trace(const char* name,
-                    size_t name_len,
-                    char type,
-                    const void* id,
-                    const char* extra,
-                    size_t extra_len);
-
-  // Allows passing extra as a std::string for convenience.
-  static void Trace(const char* name,
-                    char type,
-                    const void* id,
-                    const std::string& extra) {
-    return Trace(name, kUseStrlen, type, id, extra.c_str(), extra.length());
-  }
-
-  // Allows passing extra as a const char* to avoid constructing temporary
-  // std::string instances where not needed.
-  static void Trace(const char* name,
-                    char type,
-                    const void* id,
-                    const char* extra) {
-    return Trace(name, kUseStrlen, type, id, extra, kUseStrlen);
-  }
-
-  // Retrieves the singleton.
-  // Note that this may return NULL post-AtExit processing.
-  static TraceEventETWProvider* GetInstance();
-
-  // Returns true iff tracing is turned on.
-  bool IsTracing() {
-    return enable_level() >= TRACE_LEVEL_INFORMATION;
-  }
-
-  // Emit a trace of type |type| containing |name|, |id|, and |extra|.
-  // Note: |name| and |extra| must be NULL, or a zero-terminated string of
-  //    length |name_len| or |extra_len| respectively.
-  // Note: if name_len or extra_len are kUseStrlen, the length of the
-  //    corresponding string will be used.
-  void TraceEvent(const char* name,
-                  size_t name_len,
-                  char type,
-                  const void* id,
-                  const char* extra,
-                  size_t extra_len);
-
-  // Exposed for unittesting only, allows resurrecting our
-  // singleton instance post-AtExit processing.
-  static void Resurrect();
-
- private:
-  // Ensure only the provider can construct us.
-  friend struct StaticMemorySingletonTraits<TraceEventETWProvider>;
-  TraceEventETWProvider();
-
-  DISALLOW_COPY_AND_ASSIGN(TraceEventETWProvider);
-};
-
-// The ETW trace provider GUID.
-BASE_EXPORT extern const GUID kChromeTraceProviderName;
-
-// The ETW event class GUID for 32 bit events.
-BASE_EXPORT extern const GUID kTraceEventClass32;
-
-// The ETW event class GUID for 64 bit events.
-BASE_EXPORT extern const GUID kTraceEventClass64;
-
-// The ETW event types, IDs 0x00-0x09 are reserved, so start at 0x10.
-const base::win::EtwEventType kTraceEventTypeBegin = 0x10;
-const base::win::EtwEventType kTraceEventTypeEnd = 0x11;
-const base::win::EtwEventType kTraceEventTypeInstant = 0x12;
-
-// If this flag is set in enable flags
-enum TraceEventETWFlags {
-  CAPTURE_STACK_TRACE = 0x0001,
-};
-
-// The event format consists of:
-// The "name" string as a zero-terminated ASCII string.
-// The id pointer in the machine bitness.
-// The "extra" string as a zero-terminated ASCII string.
-// Optionally the stack trace, consisting of a DWORD "depth", followed
-//    by an array of void* (machine bitness) of length "depth".
-
-}  // namespace debug
-}  // namespace base
+#include "base/trace_event/trace_event_win.h"
 
 #endif  // BASE_DEBUG_TRACE_EVENT_WIN_H_