Revert "Add option to export tracing events to ETW."

base/trace_event/trace_event_etw_export_win.cc

Index: base/trace_event/trace_event_etw_export_win.cc
diff --git a/base/trace_event/trace_event_etw_export_win.cc b/base/trace_event/trace_event_etw_export_win.cc
deleted file mode 100644
index e12782c15939c8f4bff08c5e5e7a7c40f31508e0..0000000000000000000000000000000000000000
--- a/base/trace_event/trace_event_etw_export_win.cc
+++ /dev/null
@@ -1,239 +0,0 @@
-// Copyright (c) 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 "base/trace_event/trace_event_etw_export_win.h"
-
-#include "base/command_line.h"
-#include "base/logging.h"
-#include "base/memory/singleton.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/trace_event/trace_event.h"
-#include "base/trace_event/trace_event_impl.h"
-
-// The GetProcAddress technique is borrowed from
-// https://github.com/randomascii/main/tree/master/xperf/ETWProviders
-//
-// EVNTAPI is used in evntprov.h which is included by chrome_events_win.h.
-// We define EVNTAPI without the DECLSPEC_IMPORT specifier so that we can
-// implement these functions locally instead of using the import library, and
-// can therefore still run on Windows XP.
-#define EVNTAPI __stdcall
-// Include the event register/write/unregister macros compiled from the manifest
-// file. Note that this includes evntprov.h which requires a Vista+ Windows SDK.
-//
-// In SHARED_INTERMEDIATE_DIR.
-#include "base/trace_event/etw_manifest/chrome_events_win.h"  // NOLINT
-
-namespace {
-// Typedefs for use with GetProcAddress
-typedef ULONG(__stdcall* tEventRegister)(LPCGUID ProviderId,
-                                         PENABLECALLBACK EnableCallback,
-                                         PVOID CallbackContext,
-                                         PREGHANDLE RegHandle);
-typedef ULONG(__stdcall* tEventWrite)(REGHANDLE RegHandle,
-                                      PCEVENT_DESCRIPTOR EventDescriptor,
-                                      ULONG UserDataCount,
-                                      PEVENT_DATA_DESCRIPTOR UserData);
-typedef ULONG(__stdcall* tEventUnregister)(REGHANDLE RegHandle);
-
-tEventRegister EventRegisterProc = nullptr;
-tEventWrite EventWriteProc = nullptr;
-tEventUnregister EventUnregisterProc = nullptr;
-}  // namespace
-
-// Redirector function for EventRegister. Called by macros in
-// chrome_events_win.h
-ULONG EVNTAPI EventRegister(LPCGUID ProviderId,
-                            PENABLECALLBACK EnableCallback,
-                            PVOID CallbackContext,
-                            PREGHANDLE RegHandle) {
-  if (EventRegisterProc)
-    return EventRegisterProc(ProviderId, EnableCallback, CallbackContext,
-                             RegHandle);
-  return 0;
-}
-
-// Redirector function for EventWrite. Called by macros in
-// chrome_events_win.h
-ULONG EVNTAPI EventWrite(REGHANDLE RegHandle,
-                         PCEVENT_DESCRIPTOR EventDescriptor,
-                         ULONG UserDataCount,
-                         PEVENT_DATA_DESCRIPTOR UserData) {
-  if (EventWriteProc)
-    return EventWriteProc(RegHandle, EventDescriptor, UserDataCount, UserData);
-  return 0;
-}
-
-// Redirector function for EventUnregister. Called by macros in
-// chrome_events_win.h
-ULONG EVNTAPI EventUnregister(REGHANDLE RegHandle) {
-  if (EventUnregisterProc)
-    return EventUnregisterProc(RegHandle);
-  return 0;
-}
-
-namespace base {
-namespace trace_event {
-
-TraceEventETWExport::TraceEventETWExport() : ETWExportEnabled_(false) {
-  // Find Advapi32.dll. This should always succeed.
-  HMODULE AdvapiDLL = ::LoadLibraryW(L"Advapi32.dll");
-  if (AdvapiDLL) {
-    // Try to find the ETW functions. This will fail on XP.
-    EventRegisterProc = reinterpret_cast<tEventRegister>(
-        ::GetProcAddress(AdvapiDLL, "EventRegister"));
-    EventWriteProc = reinterpret_cast<tEventWrite>(
-        ::GetProcAddress(AdvapiDLL, "EventWrite"));
-    EventUnregisterProc = reinterpret_cast<tEventUnregister>(
-        ::GetProcAddress(AdvapiDLL, "EventUnregister"));
-
-    // Register the ETW provider. If registration fails then the event logging
-    // calls will fail (on XP this call will do nothing).
-    EventRegisterChrome();
-  }
-}
-
-TraceEventETWExport::~TraceEventETWExport() {
-  EventUnregisterChrome();
-}
-
-// static
-TraceEventETWExport* TraceEventETWExport::GetInstance() {
-  return Singleton<TraceEventETWExport,
-                   StaticMemorySingletonTraits<TraceEventETWExport>>::get();
-}
-
-// static
-void TraceEventETWExport::EnableETWExport() {
-  GetInstance()->ETWExportEnabled_ = true;
-}
-
-// static
-void TraceEventETWExport::DisableETWExport() {
-  GetInstance()->ETWExportEnabled_ = false;
-}
-
-// static
-void TraceEventETWExport::AddEvent(
-    char phase,
-    const unsigned char* category_group_enabled,
-    const char* name,
-    unsigned long long id,
-    int num_args,
-    const char** arg_names,
-    const unsigned char* arg_types,
-    const unsigned long long* arg_values,
-    const scoped_refptr<ConvertableToTraceFormat>* convertable_values) {
-  // We bail early in case exporting is disabled or no consumer is listening.
-  if (!GetInstance()->ETWExportEnabled_ || !EventEnabledChromeEvent())
-    return;
-
-  std::string phase_string;
-  switch (phase) {
-    case TRACE_EVENT_PHASE_BEGIN:
-      phase_string = "Begin";
-      break;
-    case TRACE_EVENT_PHASE_END:
-      phase_string = "End";
-      break;
-    case TRACE_EVENT_PHASE_COMPLETE:
-      phase_string = "Complete";
-      break;
-    case TRACE_EVENT_PHASE_INSTANT:
-      phase_string = "Instant";
-      break;
-    case TRACE_EVENT_PHASE_ASYNC_BEGIN:
-      phase_string = "Async Begin";
-      break;
-    case TRACE_EVENT_PHASE_ASYNC_STEP_INTO:
-      phase_string = "Async Step Into";
-      break;
-    case TRACE_EVENT_PHASE_ASYNC_STEP_PAST:
-      phase_string = "Async Step Past";
-      break;
-    case TRACE_EVENT_PHASE_ASYNC_END:
-      phase_string = "Async End";
-      break;
-    case TRACE_EVENT_PHASE_NESTABLE_ASYNC_BEGIN:
-      phase_string = "Nestable Async Begin";
-      break;
-    case TRACE_EVENT_PHASE_NESTABLE_ASYNC_END:
-      phase_string = "Nestable Async End";
-      break;
-    case TRACE_EVENT_PHASE_NESTABLE_ASYNC_INSTANT:
-      phase_string = "Nestable Async Instant";
-      break;
-    case TRACE_EVENT_PHASE_FLOW_BEGIN:
-      phase_string = "Phase Flow Begin";
-      break;
-    case TRACE_EVENT_PHASE_FLOW_STEP:
-      phase_string = "Phase Flow Step";
-      break;
-    case TRACE_EVENT_PHASE_FLOW_END:
-      phase_string = "Phase Flow End";
-      break;
-    case TRACE_EVENT_PHASE_METADATA:
-      phase_string = "Phase Metadata";
-      break;
-    case TRACE_EVENT_PHASE_COUNTER:
-      phase_string = "Phase Counter";
-      break;
-    case TRACE_EVENT_PHASE_SAMPLE:
-      phase_string = "Phase Sample";
-      break;
-    case TRACE_EVENT_PHASE_CREATE_OBJECT:
-      phase_string = "Phase Create Object";
-      break;
-    case TRACE_EVENT_PHASE_SNAPSHOT_OBJECT:
-      phase_string = "Phase Snapshot Object";
-      break;
-    case TRACE_EVENT_PHASE_DELETE_OBJECT:
-      phase_string = "Phase Delete Object";
-      break;
-    default:
-      phase_string.push_back(phase);
-      break;
-  }
-
-  std::string arg_values_string[3];
-  for (int i = 0; i < num_args; i++) {
-    if (arg_types[i] == TRACE_VALUE_TYPE_CONVERTABLE) {
-      convertable_values[i]->AppendAsTraceFormat(arg_values_string + i);
-    } else {
-      TraceEvent::TraceValue trace_event;
-      trace_event.as_uint = arg_values[i];
-      TraceEvent::AppendValueAsJSON(arg_types[i], trace_event,
-                                    arg_values_string + i);
-    }
-  }
-
-  EventWriteChromeEvent(
-      name, phase_string.c_str(), num_args > 0 ? arg_names[0] : "",
-      arg_values_string[0].c_str(), num_args > 1 ? arg_names[1] : "",
-      arg_values_string[1].c_str(), num_args > 2 ? arg_names[2] : "",
-      arg_values_string[2].c_str());
-}
-
-// static
-void TraceEventETWExport::AddCustomEvent(const char* name,
-                                         char const* phase,
-                                         const char* arg_name_1,
-                                         const char* arg_value_1,
-                                         const char* arg_name_2,
-                                         const char* arg_value_2,
-                                         const char* arg_name_3,
-                                         const char* arg_value_3) {
-  if (!GetInstance()->ETWExportEnabled_ || !EventEnabledChromeEvent())
-    return;
-
-  EventWriteChromeEvent(name, phase, arg_name_1, arg_value_1, arg_name_2,
-                        arg_value_2, arg_name_3, arg_value_3);
-}
-
-void TraceEventETWExport::Resurrect() {
-  StaticMemorySingletonTraits<TraceEventETWExport>::Resurrect();
-}
-
-}  // namespace trace_event
-}  // namespace base