Get CallInterfaceDescriptor directly from CodeStub.

src/hydrogen.cc

 // Copyright 2013 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.
 
 #include "src/hydrogen.h"
 
 #include <algorithm>
 
 #include "src/v8.h"
 
@@ skipping 3416 matching lines @@
       is_recursive_(false),
       use_optimistic_licm_(false),
       depends_on_empty_array_proto_elements_(false),
       type_change_checksum_(0),
       maximum_environment_size_(0),
       no_side_effects_scope_count_(0),
       disallow_adding_new_values_(false),
       next_inline_id_(0),
       inlined_functions_(5, info->zone()) {
   if (info->IsStub()) {
-    HydrogenCodeStub* stub = info->code_stub();
-    CodeStubInterfaceDescriptor descriptor(stub);
+    CallInterfaceDescriptor descriptor =
+        info->code_stub()->GetCallInterfaceDescriptor();
     start_environment_ = new (zone_)
         HEnvironment(zone_, descriptor.GetEnvironmentParameterCount());
   } else {
     TraceInlinedFunction(info->shared_info(), HSourcePosition::Unknown());
     start_environment_ =
         new(zone_) HEnvironment(NULL, info->scope(), info->closure(), zone_);
   }
   start_environment_->set_ast_id(BailoutId::FunctionEntry());
   entry_block_ = CreateBasicBlock();
   entry_block_->SetInitialEnvironment(start_environment_);
@@ skipping 9042 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal