Remove --stop-at flag from several backends.

src/full-codegen/ppc/full-codegen-ppc.cc

Index: src/full-codegen/ppc/full-codegen-ppc.cc
diff --git a/src/full-codegen/ppc/full-codegen-ppc.cc b/src/full-codegen/ppc/full-codegen-ppc.cc
index 0857d97c9683ccaf5786cb0f92c144999c665c18..f235e6db677a3cef794c106fd86378982e2b4033 100644
--- a/src/full-codegen/ppc/full-codegen-ppc.cc
+++ b/src/full-codegen/ppc/full-codegen-ppc.cc
@@ -108,13 +108,6 @@ void FullCodeGenerator::Generate() {
 
   ProfileEntryHookStub::MaybeCallEntryHook(masm_);
 
-#ifdef DEBUG
-  if (strlen(FLAG_stop_at) > 0 &&
-      info->literal()->name()->IsUtf8EqualTo(CStrVector(FLAG_stop_at))) {
-    __ stop("stop-at");
-  }
-#endif
-
   if (FLAG_debug_code && info->ExpectsJSReceiverAsReceiver()) {
     int receiver_offset = info->scope()->num_parameters() * kPointerSize;
     __ LoadP(r5, MemOperand(sp, receiver_offset), r0);