Remove Isolate::cpu_profiler() usage in api.cc

src/api.cc

 // 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.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 8212 matching lines @@
 
 
 const std::vector<CpuProfileDeoptInfo>& CpuProfileNode::GetDeoptInfos() const {
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
   return node->deopt_infos();
 }
 
 
 void CpuProfile::Delete() {
   i::CpuProfile* profile = reinterpret_cast<i::CpuProfile*>(this);
-  i::Isolate* isolate = profile->top_down()->isolate();
-  i::CpuProfiler* profiler = isolate->cpu_profiler();
-  DCHECK(profiler != NULL);
+  i::CpuProfiler* profiler = profile->cpu_profiler();
+  DCHECK(profiler != nullptr);
   profiler->DeleteProfile(profile);
 }
 
 
 Local<String> CpuProfile::GetTitle() const {
   const i::CpuProfile* profile = reinterpret_cast<const i::CpuProfile*>(this);
   i::Isolate* isolate = profile->top_down()->isolate();
   return ToApiHandle<String>(isolate->factory()->InternalizeUtf8String(
       profile->title()));
 }
@@ skipping 551 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8