[stubs] Optimize LoadGlobalViaContextStub and StoreGlobalViaContextStub.

src/interface-descriptors.h

 // Copyright 2014 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_CALL_INTERFACE_DESCRIPTOR_H_
 #define V8_CALL_INTERFACE_DESCRIPTOR_H_
 
 #include "src/assembler.h"
 #include "src/macro-assembler.h"
 
@@ skipping 405 matching lines @@
  public:
   DECLARE_DESCRIPTOR(RegExpConstructResultDescriptor, CallInterfaceDescriptor)
 };
 
 
 class LoadGlobalViaContextDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(LoadGlobalViaContextDescriptor,
                                                CallInterfaceDescriptor)
 
-  static const Register DepthRegister();
   static const Register SlotRegister();
   static const Register NameRegister();
 };
 
 
 class StoreGlobalViaContextDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(StoreGlobalViaContextDescriptor,
                                                CallInterfaceDescriptor)
 
-  static const Register DepthRegister();
   static const Register SlotRegister();
   static const Register NameRegister();
   static const Register ValueRegister();
 };
 
 
 class TransitionElementsKindDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(TransitionElementsKindDescriptor, CallInterfaceDescriptor)
 };
@@ skipping 197 matching lines @@
 }  // namespace v8::internal
 
 
 #if V8_TARGET_ARCH_ARM64
 #include "src/arm64/interface-descriptors-arm64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "src/arm/interface-descriptors-arm.h"
 #endif
 
 #endif  // V8_CALL_INTERFACE_DESCRIPTOR_H_