Fix for a GC-stress failures after r20987.

src/factory.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_FACTORY_H_
 #define V8_FACTORY_H_
 
 #include "isolate.h"
 
 namespace v8 {
@@ skipping 142 matching lines @@
       uint32_t hash_field);
 
   MUST_USE_RESULT Handle<String> NewOneByteInternalizedString(
         Vector<const uint8_t> str,
         uint32_t hash_field);
 
   MUST_USE_RESULT Handle<String> NewTwoByteInternalizedString(
         Vector<const uc16> str,
         uint32_t hash_field);
 
-  template<typename T>
   MUST_USE_RESULT Handle<String> NewInternalizedStringImpl(
-      T t, int chars, uint32_t hash_field);
+      Handle<String> string, int chars, uint32_t hash_field);
 
   // Compute the matching internalized string map for a string if possible.
   // Empty handle is returned if string is in new space or not flattened.
   MUST_USE_RESULT MaybeHandle<Map> InternalizedStringMapForString(
       Handle<String> string);
 
   // Allocates and partially initializes an ASCII or TwoByte String. The
   // characters of the string are uninitialized. Currently used in regexp code
   // only, where they are pretenured.
   MUST_USE_RESULT MaybeHandle<SeqOneByteString> NewRawOneByteString(
@@ skipping 513 matching lines @@
   // the string representation of the number.  Otherwise return undefined.
   Handle<Object> GetNumberStringCache(Handle<Object> number);
 
   // Update the cache with a new number-string pair.
   void SetNumberStringCache(Handle<Object> number, Handle<String> string);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_FACTORY_H_