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

test/cctest/test-compiler.cc

 // Copyright 2012 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 38 matching lines @@
   Handle<String> internalized_name =
       isolate->factory()->InternalizeUtf8String(name);
   Handle<JSObject> global(isolate->context()->global_object());
   Runtime::SetObjectProperty(isolate, global, internalized_name, object, NONE,
                              SLOPPY).Check();
 }
 
 
 static Handle<JSFunction> Compile(const char* source) {
   Isolate* isolate = CcTest::i_isolate();
-  Handle<String> source_code(
-      isolate->factory()->NewStringFromUtf8(CStrVector(source)));
+  Handle<String> source_code = isolate->factory()->NewStringFromUtf8(
+      CStrVector(source)).ToHandleChecked();
   Handle<SharedFunctionInfo> shared_function =
       Compiler::CompileScript(source_code,
                               Handle<String>(),
                               0,
                               0,
                               false,
                               Handle<Context>(isolate->native_context()),
                               NULL, NULL, NO_CACHED_DATA,
                               NOT_NATIVES_CODE);
   return isolate->factory()->NewFunctionFromSharedFunctionInfo(
@@ skipping 300 matching lines @@
   CompileRun("function f() { a = 12345678 }; f();");
   CheckCodeForUnsafeLiteral(GetJSFunction(context->Global(), "f"));
   CompileRun("function f(x) { a = 12345678 + x}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(context->Global(), "f"));
   CompileRun("function f(x) { var arguments = 1; x += 12345678}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(context->Global(), "f"));
   CompileRun("function f(x) { var arguments = 1; x = 12345678}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(context->Global(), "f"));
 }
 #endif