Linux perf support update.

src/base/platform/platform-win32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Platform-specific code for Win32.
 
 // Secure API functions are not available using MinGW with msvcrt.dll
 // on Windows XP. Make sure MINGW_HAS_SECURE_API is not defined to
 // disable definition of secure API functions in standard headers that
 // would conflict with our own implementation.
@@ skipping 499 matching lines @@
 int OS::GetLastError() {
   return ::GetLastError();
 }
 
 
 int OS::GetCurrentProcessId() {
   return static_cast<int>(::GetCurrentProcessId());
 }
 
 
+int OS::GetCurrentThreadId() {
+  return static_cast<int>(::GetCurrentThreadId());
+}
+
+
 // ----------------------------------------------------------------------------
 // Win32 console output.
 //
 // If a Win32 application is linked as a console application it has a normal
 // standard output and standard error. In this case normal printf works fine
 // for output. However, if the application is linked as a GUI application,
 // the process doesn't have a console, and therefore (debugging) output is lost.
 // This is the case if we are embedded in a windows program (like a browser).
 // In order to be able to get debug output in this case the the debugging
 // facility using OutputDebugString. This output goes to the active debugger
@@ skipping 885 matching lines @@
   ASSERT(result);
 }
 
 
 
 void Thread::YieldCPU() {
   Sleep(0);
 }
 
 } }  // namespace v8::base