MIPS: * src/generator.js: Add methods and intialization for generator meta-objects.

src/mips/code-stubs-mips.cc

Index: src/mips/code-stubs-mips.cc
diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index 3d1330be336312072c04efd1ca00d20ba8393d4b..5cbfb647f9b358f3adebbd135f4eeaac6aa5530c 100644
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -196,9 +196,7 @@ void FastNewClosureStub::Generate(MacroAssembler* masm) {
 
   __ IncrementCounter(counters->fast_new_closure_total(), 1, t2, t3);
 
-  int map_index = (language_mode_ == CLASSIC_MODE)
-      ? Context::FUNCTION_MAP_INDEX
-      : Context::STRICT_MODE_FUNCTION_MAP_INDEX;
+  int map_index = Context::FunctionMapIndex(language_mode_, is_generator_);
 
   // Compute the function map in the current native context and set that
   // as the map of the allocated object.