Abstract out ThreadDebugger from V8PerIsolateData

third_party/WebKit/Source/core/inspector/ThreadDebugger.cpp

 // Copyright 2016 The Chromium 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 "core/inspector/ThreadDebugger.h"
 
 #include "bindings/core/v8/SourceLocation.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/V8DOMException.h"
 #include "bindings/core/v8/V8DOMTokenList.h"
@@ skipping 23 matching lines @@
       m_v8Inspector(v8_inspector::V8Inspector::create(isolate, this)),
       m_v8TracingCpuProfiler(v8::TracingCpuProfiler::Create(isolate)) {}
 
 ThreadDebugger::~ThreadDebugger() {}
 
 // static
 ThreadDebugger* ThreadDebugger::from(v8::Isolate* isolate) {
   if (!isolate)
     return nullptr;
   V8PerIsolateData* data = V8PerIsolateData::from(isolate);
-  return data ? data->threadDebugger() : nullptr;
+  return data ? static_cast<ThreadDebugger*>(data->threadDebugger()) : nullptr;
 }
 
 // static
 MessageLevel ThreadDebugger::v8MessageLevelToMessageLevel(
     v8::Isolate::MessageErrorLevel level) {
   MessageLevel result = InfoMessageLevel;
   switch (level) {
     case v8::Isolate::kMessageDebug:
       result = VerboseMessageLevel;
       break;
@@ skipping 426 matching lines @@
 void ThreadDebugger::onTimer(TimerBase* timer) {
   for (size_t index = 0; index < m_timers.size(); ++index) {
     if (m_timers[index].get() == timer) {
       m_timerCallbacks[index](m_timerData[index]);
       return;
     }
   }
 }
 
 }  // namespace blink