Move allocation of static API handles Dart_True, etc.

runtime/vm/dart_api_state.h

Index: runtime/vm/dart_api_state.h
diff --git a/runtime/vm/dart_api_state.h b/runtime/vm/dart_api_state.h
index 34b9f9a0995c0e380d888ee3ef39d4106c4392cd..2565bfe6bc41b7a686dceacd75539c00d9222318 100644
--- a/runtime/vm/dart_api_state.h
+++ b/runtime/vm/dart_api_state.h
@@ -129,6 +129,10 @@ class LocalHandle {
   void set_raw(RawObject* raw) { raw_ = raw; }
   static intptr_t raw_offset() { return OFFSET_OF(LocalHandle, raw_); }
 
+  Dart_Handle apiHandle() {
+    return reinterpret_cast<Dart_Handle>(this);
+  }
+
  private:
   LocalHandle() { }
   ~LocalHandle() { }