Rename OnThreadExit to OnDartThreadExit to fix Dartium windows build

runtime/vm/os_thread_win.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"  // NOLINT
 #if defined(TARGET_OS_WINDOWS)
 
 #include "vm/os_thread.h"
 
 #include <process.h>  // NOLINT
@@ skipping 500 matching lines @@
 #pragma comment(linker, "/INCLUDE:p_thread_callback_dart")
 
 #else  // _WIN64
 
 #pragma comment(linker, "/INCLUDE:__tls_used")
 #pragma comment(linker, "/INCLUDE:_p_thread_callback_dart")
 
 #endif  // _WIN64
 
 // Static callback function to call with each thread termination.
-void NTAPI OnThreadExit(PVOID module, DWORD reason, PVOID reserved) {
+void NTAPI OnDartThreadExit(PVOID module, DWORD reason, PVOID reserved) {
   // On XP SP0 & SP1, the DLL_PROCESS_ATTACH is never seen. It is sent on SP2+
   // and on W2K and W2K3. So don't assume it is sent.
   if (DLL_THREAD_DETACH == reason || DLL_PROCESS_DETACH == reason) {
     dart::ThreadCleanupOnExit();
     dart::MonitorWaitData::ThreadExit();
   }
 }
 
 // .CRT$XLA to .CRT$XLZ is an array of PIMAGE_TLS_CALLBACK pointers that are
 // called automatically by the OS loader code (not the CRT) when the module is
 // loaded and on thread creation. They are NOT called if the module has been
 // loaded by a LoadLibrary() call. It must have implicitly been loaded at
 // process startup.
 // By implicitly loaded, I mean that it is directly referenced by the main EXE
 // or by one of its dependent DLLs. Delay-loaded DLL doesn't count as being
 // implicitly loaded.
 //
 // See VC\crt\src\tlssup.c for reference.
 
 // extern "C" suppresses C++ name mangling so we know the symbol name for the
 // linker /INCLUDE:symbol pragma above.
 extern "C" {
 // The linker must not discard p_thread_callback_dart.  (We force a reference
 // to this variable with a linker /INCLUDE:symbol pragma to ensure that.) If
-// this variable is discarded, the OnThreadExit function will never be called.
+// this variable is discarded, the OnDartThreadExit function will never be
+// called.
 #ifdef _WIN64
 
 // .CRT section is merged with .rdata on x64 so it must be constant data.
 #pragma const_seg(".CRT$XLB")
 // When defining a const variable, it must have external linkage to be sure the
 // linker doesn't discard it.
 extern const PIMAGE_TLS_CALLBACK p_thread_callback_dart;
-const PIMAGE_TLS_CALLBACK p_thread_callback_dart = OnThreadExit;
+const PIMAGE_TLS_CALLBACK p_thread_callback_dart = OnDartThreadExit;
 
 // Reset the default section.
 #pragma const_seg()
 
 #else  // _WIN64
 
 #pragma data_seg(".CRT$XLB")
-PIMAGE_TLS_CALLBACK p_thread_callback_dart = OnThreadExit;
+PIMAGE_TLS_CALLBACK p_thread_callback_dart = OnDartThreadExit;
 
 // Reset the default section.
 #pragma data_seg()
 
 #endif  // _WIN64
 }  // extern "C"
 
 #endif  // defined(TARGET_OS_WINDOWS)