Enable background compilation of regexp methods. Regexp functions may use indirect goto instruction…

runtime/vm/compiler.cc

Index: runtime/vm/compiler.cc
diff --git a/runtime/vm/compiler.cc b/runtime/vm/compiler.cc
index 6365b3c79d766a085babfa7d76f2274bde9be287..9482b3e6a7567510c6313c13c42dcd9616a65beb 100644
--- a/runtime/vm/compiler.cc
+++ b/runtime/vm/compiler.cc
@@ -1294,11 +1294,8 @@ RawError* Compiler::CompileOptimizedFunction(Thread* thread,
 
   // Optimization must happen in non-mutator/Dart thread if background
   // compilation is on. OSR compilation still occurs in the main thread.
-  // TODO(Srdjan): Remove assert allowance for regular expression functions
-  // once they can be compiled in background.
   ASSERT((osr_id != kNoOSRDeoptId) || !FLAG_background_compilation ||
-         !thread->IsMutatorThread() ||
-         function.IsIrregexpFunction());
+         !thread->IsMutatorThread());
   CompilationPipeline* pipeline =
       CompilationPipeline::New(thread->zone(), function);
   return CompileFunctionHelper(pipeline,