Windows: Link library sources into gen_snapshot/dart_bootstrap

runtime/vm/globals.h

Index: runtime/vm/globals.h
diff --git a/runtime/vm/globals.h b/runtime/vm/globals.h
index 39743c5d15306d81e79da66a9de66f67b609859a..04240d93e214c67e9ccffda99d8ecfbf81088981 100644
--- a/runtime/vm/globals.h
+++ b/runtime/vm/globals.h
@@ -135,16 +135,8 @@ static const uword kZapUninitializedWord = 0xabababababababab;
 #error Unknown host architecture.
 #endif
 
-
 #endif  // !defined(TARGET_OS_WINDOWS))
 
-// Default value for flag --use-corelib-source-files.
-#if defined(TARGET_OS_WINDOWS)
-static const bool kDefaultCorelibSourceFlag = true;
-#else
-static const bool kDefaultCorelibSourceFlag = false;
-#endif  // defined(TARGET_OS_WINDOWS)
-
 }  // namespace dart
 
 #endif  // RUNTIME_VM_GLOBALS_H_