Tighten up assertions checking GC-safety of stub calls.

src/arm/macro-assembler-arm.cc

Index: src/arm/macro-assembler-arm.cc
diff --git a/src/arm/macro-assembler-arm.cc b/src/arm/macro-assembler-arm.cc
index b3990c34b1840b4cacca851ef0fd5236f894f8d1..918907b862ac49f20663660a577e49ada1baae9e 100644
--- a/src/arm/macro-assembler-arm.cc
+++ b/src/arm/macro-assembler-arm.cc
@@ -2003,7 +2003,7 @@ MaybeObject* MacroAssembler::TryCallStub(CodeStub* stub, Condition cond) {
 
 
 void MacroAssembler::TailCallStub(CodeStub* stub, Condition cond) {
-  ASSERT(stub->CompilingCallsToThisStubIsGCSafe() || allow_stub_calls_);
+  ASSERT(allow_stub_calls_ || stub->CompilingCallsToThisStubIsGCSafe());
   Jump(stub->GetCode(), RelocInfo::CODE_TARGET, cond);
 }
 
@@ -2113,7 +2113,7 @@ 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();
 }