Return Object* instead of MaybeObject* from runtime calls.

src/x64/regexp-macro-assembler-x64.cc

Index: src/x64/regexp-macro-assembler-x64.cc
diff --git a/src/x64/regexp-macro-assembler-x64.cc b/src/x64/regexp-macro-assembler-x64.cc
index 807e00b97c7f7a6110e11ce0e5cad067bd6e6871..d488f5b0a3dfadc84ad191bd97f4ff9d380f55d7 100644
--- a/src/x64/regexp-macro-assembler-x64.cc
+++ b/src/x64/regexp-macro-assembler-x64.cc
@@ -1233,7 +1233,7 @@ int RegExpMacroAssemblerX64::CheckStackGuardState(Address* return_address,
   ASSERT(*return_address <=
       re_code->instruction_start() + re_code->instruction_size());
 
-  MaybeObject* result = Execution::HandleStackGuardInterrupt(isolate);
+  Object* result = Execution::HandleStackGuardInterrupt(isolate);
 
   if (*code_handle != re_code) {  // Return address no longer valid
     intptr_t delta = code_handle->address() - re_code->address();