Tighten up assertions checking GC-safety of stub calls.

src/mips/macro-assembler-mips.cc

Index: src/mips/macro-assembler-mips.cc
diff --git a/src/mips/macro-assembler-mips.cc b/src/mips/macro-assembler-mips.cc
index fd89d576436a8ce34d6c578ad3779e24208aec21..d7732c6a381b3ddbc61534c51de4f4764f43c4aa 100644
--- a/src/mips/macro-assembler-mips.cc
+++ b/src/mips/macro-assembler-mips.cc
@@ -3575,7 +3575,7 @@ MaybeObject* MacroAssembler::TryCallStub(CodeStub* stub, Condition cond,
 
 
 void MacroAssembler::TailCallStub(CodeStub* stub) {
-  ASSERT(stub->CompilingCallsToThisStubIsGCSafe() || allow_stub_calls_);
+  ASSERT(allow_stub_calls_ || stub->CompilingCallsToThisStubIsGCSafe());
   Jump(stub->GetCode(), RelocInfo::CODE_TARGET);
 }
 
@@ -3694,7 +3694,7 @@ MaybeObject* MacroAssembler::TryCallApiFunctionAndReturn(
 
 bool MacroAssembler::AllowThisStubCall(CodeStub* stub) {
   if (!has_frame_ && stub->SometimesSetsUpAFrame()) return false;
-  return stub->CompilingCallsToThisStubIsGCSafe() || allow_stub_calls_;
+  return allow_stub_calls_ || stub->CompilingCallsToThisStubIsGCSafe();
 }