Fix /analyze warning and update code URL.

base/trace_event/trace_event_etw_export_win.cc

 // Copyright 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
+// https://github.com/google/UIforETW/tree/master/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.
@@ skipping 18 matching lines @@
 
 // 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);
+  *RegHandle = 0;

[dsinclair, 2015/05/19 15:39:37]

Does chromium still use 0 or is nullptr acceptable now?

   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)
@@ skipping 166 matching lines @@
   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