Remove direct calls to number-related allocators from runtime.cc.

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index 107cbfd1ceb8488cef9cd5f65ecac41f2ccc5975..e4c0f686e717a472bb3791070baf1bf6db041fe5 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -486,7 +486,8 @@ class Factory V8_FINAL {
   Handle<JSFunction> NewFunctionWithoutPrototype(Handle<String> name,
                                                  Handle<Code> code);
 
-  Handle<String> NumberToString(Handle<Object> number);
+  Handle<String> NumberToString(Handle<Object> number,
+                                bool check_number_string_cache = true);
   Handle<String> Uint32ToString(uint32_t value);
 
   enum ApiInstanceType {