Unify and simplify the FastCloneShallowArrayStub

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index 0840f6c21f4dd966a66ed94f65075be37a8814eb..9d334ff051b1e2a63f8d96a00b11243c64a2c2f4 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -45,6 +45,7 @@ CodeStubInterfaceDescriptor::CodeStubInterfaceDescriptor()
       hint_stack_parameter_count_(-1),
       function_mode_(NOT_JS_FUNCTION_STUB_MODE),
       register_params_(NULL),
+      register_param_representations_(NULL),
       deoptimization_handler_(NULL),
       handler_arguments_mode_(DONT_PASS_ARGUMENTS),
       miss_handler_(),
@@ -752,8 +753,7 @@ void FastNewContextStub::InstallDescriptors(Isolate* isolate) {
 
 // static
 void FastCloneShallowArrayStub::InstallDescriptors(Isolate* isolate) {
-  FastCloneShallowArrayStub stub(FastCloneShallowArrayStub::CLONE_ELEMENTS,
-                                 DONT_TRACK_ALLOCATION_SITE, 0);
+  FastCloneShallowArrayStub stub(DONT_TRACK_ALLOCATION_SITE);
   InstallDescriptor(isolate, &stub);
 }