[Interpreter] Make InterpreterAssembler a subclass of CodeStubAssembler.

src/interface-descriptors.h

Index: src/interface-descriptors.h
diff --git a/src/interface-descriptors.h b/src/interface-descriptors.h
index f9720dfc50f3af69b482f3dbab92ed806c8d0000..6a5e1fa5efd97ed7958d34a3a4914687b6933988 100644
--- a/src/interface-descriptors.h
+++ b/src/interface-descriptors.h
@@ -76,6 +76,7 @@ class PlatformInterfaceDescriptor;
   V(MathPowInteger)                           \
   V(ContextOnly)                              \
   V(GrowArrayElements)                        \
+  V(InterpreterDispatch)                      \
   V(InterpreterPushArgsAndCall)               \
   V(InterpreterPushArgsAndConstruct)          \
   V(InterpreterCEntry)
@@ -752,6 +753,18 @@ class GrowArrayElementsDescriptor : public CallInterfaceDescriptor {
   static const Register KeyRegister();
 };
 
+class InterpreterDispatchDescriptor  : public CallInterfaceDescriptor {
+ public:
+  DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(InterpreterDispatchDescriptor,
+                                               CallInterfaceDescriptor)
+
+  static const int kAccumulatorParameter = 0;
+  static const int kRegisterFileParameter = 1;
+  static const int kBytecodeOffsetParameter = 2;
+  static const int kBytecodeArrayParameter = 3;
+  static const int kDispatchTableParameter = 4;
+  static const int kContextParameter = 5;
+};
 
 class InterpreterPushArgsAndCallDescriptor : public CallInterfaceDescriptor {
  public:
@@ -773,7 +786,6 @@ class InterpreterCEntryDescriptor : public CallInterfaceDescriptor {
   DECLARE_DESCRIPTOR(InterpreterCEntryDescriptor, CallInterfaceDescriptor)
 };
 
-
 #undef DECLARE_DESCRIPTOR