(not for review): PlatformThreadHandle: remove public id() interface

base/threading/platform_thread_win.cc

Index: base/threading/platform_thread_win.cc
diff --git a/base/threading/platform_thread_win.cc b/base/threading/platform_thread_win.cc
index 059547b10ed2728d7d80580adf23d31374e11b0d..ae8344cbe6f26dfe5cbfa8652bfa82105b559ec1 100644
--- a/base/threading/platform_thread_win.cc
+++ b/base/threading/platform_thread_win.cc
@@ -123,7 +123,7 @@ bool CreateThreadInternal(size_t stack_size,
   }
 
   if (out_thread_handle)
-    *out_thread_handle = PlatformThreadHandle(thread_handle, thread_id);
+    *out_thread_handle = PlatformThreadHandle(thread_handle);
   else
     CloseHandle(thread_handle);
   return true;