Remove unused pc descriptor types.

runtime/vm/debugger_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/code_patcher.h"
 #include "vm/cpu.h"
 #include "vm/debugger.h"
 #include "vm/instructions.h"
 #include "vm/stub_code.h"
 
 namespace dart {
 
 uword CodeBreakpoint::OrigStubAddress() const {
   return saved_value_;
 }
 
 
 void CodeBreakpoint::PatchCode() {
   ASSERT(!is_enabled_);
   StubCode* stub_code = Isolate::Current()->stub_code();
   uword stub_target = 0;
   switch (breakpoint_kind_) {
     case RawPcDescriptors::kIcCall:
     case RawPcDescriptors::kUnoptStaticCall:
       stub_target = stub_code->ICCallBreakpointEntryPoint();
       break;
-    case RawPcDescriptors::kClosureCall:
-      stub_target = stub_code->ClosureCallBreakpointEntryPoint();
-      break;
     case RawPcDescriptors::kRuntimeCall: {
       stub_target = stub_code->RuntimeCallBreakpointEntryPoint();
       break;
     }
     default:
       UNREACHABLE();
   }
   const Code& code = Code::Handle(code_);
   saved_value_ =  CodePatcher::GetStaticCallTargetAt(pc_, code);
   CodePatcher::PatchPoolPointerCallAt(pc_, code, stub_target);
   is_enabled_ = true;
 }
 
 
 void CodeBreakpoint::RestoreCode() {
   ASSERT(is_enabled_);
   const Code& code = Code::Handle(code_);
   switch (breakpoint_kind_) {
     case RawPcDescriptors::kIcCall:
     case RawPcDescriptors::kUnoptStaticCall:
-    case RawPcDescriptors::kClosureCall:
     case RawPcDescriptors::kRuntimeCall: {
       CodePatcher::PatchPoolPointerCallAt(pc_, code, saved_value_);
       break;
     }
     default:
       UNREACHABLE();
   }
   is_enabled_ = false;
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64