Use a dictionary-mode code cache on the map rather than a dual system.

src/ic/ppc/handler-compiler-ppc.cc

Index: src/ic/ppc/handler-compiler-ppc.cc
diff --git a/src/ic/ppc/handler-compiler-ppc.cc b/src/ic/ppc/handler-compiler-ppc.cc
index 832c25ae485c0b11fb2832ad83a2ee7215e33c9b..8c445ddcf03ba1a8f98250827500ff6d14137b16 100644
--- a/src/ic/ppc/handler-compiler-ppc.cc
+++ b/src/ic/ppc/handler-compiler-ppc.cc
@@ -737,7 +737,7 @@ Handle<Code> NamedStoreHandlerCompiler::CompileStoreCallback(
   __ TailCallRuntime(Runtime::kStoreCallbackProperty);
 
   // Return the generated code.
-  return GetCode(kind(), Code::FAST, name);
+  return GetCode(kind(), name);
 }
 
 
@@ -777,7 +777,7 @@ Handle<Code> NamedLoadHandlerCompiler::CompileLoadGlobal(
   FrontendFooter(name, &miss);
 
   // Return the generated code.
-  return GetCode(kind(), Code::NORMAL, name);
+  return GetCode(kind(), name);
 }