Use big-boy Types to annotate interface descriptor parameters

src/code-stubs.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 413 matching lines @@
     DCHECK(!stack_parameter_count_.is_valid());
   }
 
   void set_call_descriptor(CallInterfaceDescriptor d) { call_descriptor_ = d; }
   CallInterfaceDescriptor call_descriptor() const { return call_descriptor_; }
 
   int GetEnvironmentParameterCount() const {
     return call_descriptor().GetEnvironmentParameterCount();
   }
 
-  Representation GetEnvironmentParameterRepresentation(int index) const {
-    return call_descriptor().GetEnvironmentParameterRepresentation(index);
+  Type* GetEnvironmentParameterType(int index) const {
+    return call_descriptor().GetEnvironmentParameterType(index);
   }
 
   ExternalReference miss_handler() const {
     DCHECK(has_miss_handler_);
     return miss_handler_;
   }
 
   bool has_miss_handler() const {
     return has_miss_handler_;
   }
@@ skipping 2520 matching lines @@
   DEFINE_PLATFORM_CODE_STUB(StringCompare, PlatformCodeStub);
 };
 
 
 #undef DEFINE_CALL_INTERFACE_DESCRIPTOR
 #undef DEFINE_PLATFORM_CODE_STUB
 #undef DEFINE_HANDLER_CODE_STUB
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
+
+extern Representation RepresentationFromType(Type* type);
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_