Heap::AllocateStringFromOneByte() and major part of its callers handlified.

test/cctest/test-hashing.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 185 matching lines @@
 
   CodeDesc desc;
   masm.GetCode(&desc);
   Handle<Object> undefined(isolate->heap()->undefined_value(), isolate);
   Handle<Code> code = factory->NewCode(desc,
                                        Code::ComputeFlags(Code::STUB),
                                        undefined);
   CHECK(code->IsCode());
 
   HASH_FUNCTION hash = FUNCTION_CAST<HASH_FUNCTION>(code->entry());
-  Handle<String> v8_string = factory->NewStringFromOneByte(string);
+  Handle<String> v8_string =
+      factory->NewStringFromOneByte(string).ToHandleChecked();
   v8_string->set_hash_field(String::kEmptyHashField);
 #ifdef USE_SIMULATOR
   uint32_t codegen_hash = static_cast<uint32_t>(
         reinterpret_cast<uintptr_t>(CALL_GENERATED_CODE(hash, 0, 0, 0, 0, 0)));
 #else
   uint32_t codegen_hash = hash();
 #endif
   uint32_t runtime_hash = v8_string->Hash();
   CHECK(runtime_hash == codegen_hash);
 }
@@ skipping 80 matching lines @@
   // Some pseudo-random numbers
   static const uint32_t kLimit = 1000;
   for (uint32_t i = 0; i < 5; i++) {
     for (uint32_t j = 0; j < 5; j++) {
       check(PseudoRandom(i, j) % kLimit);
     }
   }
 }
 
 #undef __