[DevTools] Split a part of V8Inspector into V8Debugger.

third_party/WebKit/Source/platform/v8_inspector/V8Debugger.cpp

-/*
- * Copyright (c) 2010-2011 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
+// 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 "platform/v8_inspector/V8InspectorImpl.h"
+#include "platform/v8_inspector/V8Debugger.h"
 
-#include "platform/inspector_protocol/Values.h"
-#include "platform/v8_inspector/Atomics.h"
 #include "platform/v8_inspector/DebuggerScript.h"
-#include "platform/v8_inspector/InspectedContext.h"
 #include "platform/v8_inspector/ScriptBreakpoint.h"
 #include "platform/v8_inspector/V8Compat.h"
-#include "platform/v8_inspector/V8ConsoleAgentImpl.h"
-#include "platform/v8_inspector/V8ConsoleMessage.h"
 #include "platform/v8_inspector/V8DebuggerAgentImpl.h"
-#include "platform/v8_inspector/V8InjectedScriptHost.h"
-#include "platform/v8_inspector/V8InspectorSessionImpl.h"
+#include "platform/v8_inspector/V8InspectorImpl.h"
 #include "platform/v8_inspector/V8InternalValueType.h"
-#include "platform/v8_inspector/V8RuntimeAgentImpl.h"
 #include "platform/v8_inspector/V8StackTraceImpl.h"
 #include "platform/v8_inspector/V8StringUtil.h"
 #include "platform/v8_inspector/public/V8InspectorClient.h"
-#include <v8-profiler.h>
 
 namespace blink {
 
 namespace {
 const char stepIntoV8MethodName[] = "stepIntoStatement";
 const char stepOutV8MethodName[] = "stepOutOfFunction";
-volatile int s_lastContextId = 0;
 static const char v8AsyncTaskEventEnqueue[] = "enqueue";
 static const char v8AsyncTaskEventWillHandle[] = "willHandle";
 static const char v8AsyncTaskEventDidHandle[] = "didHandle";
 
 inline v8::Local<v8::Boolean> v8Boolean(bool value, v8::Isolate* isolate)
 {
     return value ? v8::True(isolate) : v8::False(isolate);
 }
 
 }
 
 static bool inLiveEditScope = false;
 
-v8::MaybeLocal<v8::Value> V8InspectorImpl::callDebuggerMethod(const char* functionName, int argc, v8::Local<v8::Value> argv[])
+v8::MaybeLocal<v8::Value> V8Debugger::callDebuggerMethod(const char* functionName, int argc, v8::Local<v8::Value> argv[])
 {
     v8::MicrotasksScope microtasks(m_isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
     v8::Local<v8::Object> debuggerScript = m_debuggerScript.Get(m_isolate);
-    v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(debuggerScript->Get(v8InternalizedString(functionName)));
+    v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(debuggerScript->Get(toV8StringInternalized(m_isolate, functionName)));
     DCHECK(m_isolate->InContext());
     return function->Call(m_isolate->GetCurrentContext(), debuggerScript, argc, argv);
 }
 
-std::unique_ptr<V8Inspector> V8Inspector::create(v8::Isolate* isolate, V8InspectorClient* client)
-{
-    return wrapUnique(new V8InspectorImpl(isolate, client));
-}
-
-V8InspectorImpl::V8InspectorImpl(v8::Isolate* isolate, V8InspectorClient* client)
+V8Debugger::V8Debugger(v8::Isolate* isolate, V8InspectorImpl* inspector)
     : m_isolate(isolate)
-    , m_client(client)
-    , m_capturingStackTracesCount(0)
-    , m_lastExceptionId(0)
-    , m_enabledAgentsCount(0)
+    , m_inspector(inspector)
+    , m_lastContextId(0)
+    , m_enableCount(0)
     , m_breakpointsActivated(true)
     , m_runningNestedMessageLoop(false)
     , m_maxAsyncCallStackDepth(0)
 {
 }
 
-V8InspectorImpl::~V8InspectorImpl()
+V8Debugger::~V8Debugger()
 {
 }
 
-void V8InspectorImpl::enable()
+void V8Debugger::enable()
 {
+    if (m_enableCount++)
+        return;
     DCHECK(!enabled());
     v8::HandleScope scope(m_isolate);
-    v8::Debug::SetDebugEventListener(m_isolate, &V8InspectorImpl::v8DebugEventCallback, v8::External::New(m_isolate, this));
+    v8::Debug::SetDebugEventListener(m_isolate, &V8Debugger::v8DebugEventCallback, v8::External::New(m_isolate, this));
     m_debuggerContext.Reset(m_isolate, v8::Debug::GetDebugContext(m_isolate));
     compileDebuggerScript();
 }
 
-void V8InspectorImpl::disable()
+void V8Debugger::disable()
 {
+    if (--m_enableCount)
+        return;
     DCHECK(enabled());
     clearBreakpoints();
     m_debuggerScript.Reset();
     m_debuggerContext.Reset();
     allAsyncTasksCanceled();
     v8::Debug::SetDebugEventListener(m_isolate, nullptr);
 }
 
-bool V8InspectorImpl::enabled() const
+bool V8Debugger::enabled() const
 {
     return !m_debuggerScript.IsEmpty();
 }
 
 // static
-int V8InspectorImpl::contextId(v8::Local<v8::Context> context)
+int V8Debugger::contextId(v8::Local<v8::Context> context)
 {
     v8::Local<v8::Value> data = context->GetEmbedderData(static_cast<int>(v8::Context::kDebugIdIndex));
     if (data.IsEmpty() || !data->IsString())
         return 0;
     String16 dataString = toProtocolString(data.As<v8::String>());
     if (dataString.isEmpty())
         return 0;
     size_t commaPos = dataString.find(",");
     if (commaPos == kNotFound)
         return 0;
     size_t commaPos2 = dataString.find(",", commaPos + 1);
     if (commaPos2 == kNotFound)
         return 0;
     return dataString.substring(commaPos + 1, commaPos2 - commaPos - 1).toInt();
 }
 
 // static
-int V8InspectorImpl::getGroupId(v8::Local<v8::Context> context)
+int V8Debugger::getGroupId(v8::Local<v8::Context> context)
 {
     v8::Local<v8::Value> data = context->GetEmbedderData(static_cast<int>(v8::Context::kDebugIdIndex));
     if (data.IsEmpty() || !data->IsString())
         return 0;
     String16 dataString = toProtocolString(data.As<v8::String>());
     if (dataString.isEmpty())
         return 0;
     size_t commaPos = dataString.find(",");
     if (commaPos == kNotFound)
         return 0;
     return dataString.substring(0, commaPos).toInt();
 }
 
-void V8InspectorImpl::debuggerAgentEnabled()
-{
-    if (!m_enabledAgentsCount++)
-        enable();
-}
-
-void V8InspectorImpl::debuggerAgentDisabled()
-{
-    if (!--m_enabledAgentsCount)
-        disable();
-}
-
-V8DebuggerAgentImpl* V8InspectorImpl::findEnabledDebuggerAgent(int contextGroupId)
-{
-    if (!contextGroupId)
-        return nullptr;
-    SessionMap::iterator it = m_sessions.find(contextGroupId);
-    if (it == m_sessions.end())
-        return nullptr;
-    V8DebuggerAgentImpl* agent = it->second->debuggerAgent();
-    if (!agent->enabled())
-        return nullptr;
-    return agent;
-}
-
-V8DebuggerAgentImpl* V8InspectorImpl::findEnabledDebuggerAgent(v8::Local<v8::Context> context)
-{
-    return findEnabledDebuggerAgent(getGroupId(context));
-}
-
-void V8InspectorImpl::getCompiledScripts(int contextGroupId, std::vector<std::unique_ptr<V8DebuggerScript>>& result)
+void V8Debugger::getCompiledScripts(int contextGroupId, std::vector<std::unique_ptr<V8DebuggerScript>>& result)
 {
     v8::HandleScope scope(m_isolate);
     v8::MicrotasksScope microtasks(m_isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
     v8::Local<v8::Object> debuggerScript = m_debuggerScript.Get(m_isolate);
     DCHECK(!debuggerScript->IsUndefined());
-    v8::Local<v8::Function> getScriptsFunction = v8::Local<v8::Function>::Cast(debuggerScript->Get(v8InternalizedString("getScripts")));
+    v8::Local<v8::Function> getScriptsFunction = v8::Local<v8::Function>::Cast(debuggerScript->Get(toV8StringInternalized(m_isolate, "getScripts")));
     v8::Local<v8::Value> argv[] = { v8::Integer::New(m_isolate, contextGroupId) };
     v8::Local<v8::Value> value;
     if (!getScriptsFunction->Call(debuggerContext(), debuggerScript, PROTOCOL_ARRAY_LENGTH(argv), argv).ToLocal(&value))
         return;
     DCHECK(value->IsArray());
     v8::Local<v8::Array> scriptsArray = v8::Local<v8::Array>::Cast(value);
     result.reserve(scriptsArray->Length());
     for (unsigned i = 0; i < scriptsArray->Length(); ++i) {
         v8::Local<v8::Object> scriptObject = v8::Local<v8::Object>::Cast(scriptsArray->Get(v8::Integer::New(m_isolate, i)));
         result.push_back(wrapUnique(new V8DebuggerScript(m_isolate, scriptObject, inLiveEditScope)));
     }
 }
 
-String16 V8InspectorImpl::setBreakpoint(const String16& sourceID, const ScriptBreakpoint& scriptBreakpoint, int* actualLineNumber, int* actualColumnNumber, bool interstatementLocation)
+String16 V8Debugger::setBreakpoint(const String16& sourceID, const ScriptBreakpoint& scriptBreakpoint, int* actualLineNumber, int* actualColumnNumber, bool interstatementLocation)
 {
     v8::HandleScope scope(m_isolate);
     v8::Context::Scope contextScope(debuggerContext());
 
     v8::Local<v8::Object> info = v8::Object::New(m_isolate);
-    info->Set(v8InternalizedString("sourceID"), toV8String(m_isolate, sourceID));
-    info->Set(v8InternalizedString("lineNumber"), v8::Integer::New(m_isolate, scriptBreakpoint.lineNumber));
-    info->Set(v8InternalizedString("columnNumber"), v8::Integer::New(m_isolate, scriptBreakpoint.columnNumber));
-    info->Set(v8InternalizedString("interstatementLocation"), v8Boolean(interstatementLocation, m_isolate));
-    info->Set(v8InternalizedString("condition"), toV8String(m_isolate, scriptBreakpoint.condition));
+    info->Set(toV8StringInternalized(m_isolate, "sourceID"), toV8String(m_isolate, sourceID));
+    info->Set(toV8StringInternalized(m_isolate, "lineNumber"), v8::Integer::New(m_isolate, scriptBreakpoint.lineNumber));
+    info->Set(toV8StringInternalized(m_isolate, "columnNumber"), v8::Integer::New(m_isolate, scriptBreakpoint.columnNumber));
+    info->Set(toV8StringInternalized(m_isolate, "interstatementLocation"), v8Boolean(interstatementLocation, m_isolate));
+    info->Set(toV8StringInternalized(m_isolate, "condition"), toV8String(m_isolate, scriptBreakpoint.condition));
 
-    v8::Local<v8::Function> setBreakpointFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.Get(m_isolate)->Get(v8InternalizedString("setBreakpoint")));
+    v8::Local<v8::Function> setBreakpointFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.Get(m_isolate)->Get(toV8StringInternalized(m_isolate, "setBreakpoint")));
     v8::Local<v8::Value> breakpointId = v8::Debug::Call(debuggerContext(), setBreakpointFunction, info).ToLocalChecked();
     if (!breakpointId->IsString())
         return "";
-    *actualLineNumber = info->Get(v8InternalizedString("lineNumber"))->Int32Value();
-    *actualColumnNumber = info->Get(v8InternalizedString("columnNumber"))->Int32Value();
+    *actualLineNumber = info->Get(toV8StringInternalized(m_isolate, "lineNumber"))->Int32Value();
+    *actualColumnNumber = info->Get(toV8StringInternalized(m_isolate, "columnNumber"))->Int32Value();
     return toProtocolString(breakpointId.As<v8::String>());
 }
 
-void V8InspectorImpl::removeBreakpoint(const String16& breakpointId)
+void V8Debugger::removeBreakpoint(const String16& breakpointId)
 {
     v8::HandleScope scope(m_isolate);
     v8::Context::Scope contextScope(debuggerContext());
 
     v8::Local<v8::Object> info = v8::Object::New(m_isolate);
-    info->Set(v8InternalizedString("breakpointId"), toV8String(m_isolate, breakpointId));
+    info->Set(toV8StringInternalized(m_isolate, "breakpointId"), toV8String(m_isolate, breakpointId));
 
-    v8::Local<v8::Function> removeBreakpointFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.Get(m_isolate)->Get(v8InternalizedString("removeBreakpoint")));
+    v8::Local<v8::Function> removeBreakpointFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.Get(m_isolate)->Get(toV8StringInternalized(m_isolate, "removeBreakpoint")));
     v8::Debug::Call(debuggerContext(), removeBreakpointFunction, info).ToLocalChecked();
 }
 
-void V8InspectorImpl::clearBreakpoints()
+void V8Debugger::clearBreakpoints()
 {
     v8::HandleScope scope(m_isolate);
     v8::Context::Scope contextScope(debuggerContext());
 
-    v8::Local<v8::Function> clearBreakpoints = v8::Local<v8::Function>::Cast(m_debuggerScript.Get(m_isolate)->Get(v8InternalizedString("clearBreakpoints")));
+    v8::Local<v8::Function> clearBreakpoints = v8::Local<v8::Function>::Cast(m_debuggerScript.Get(m_isolate)->Get(toV8StringInternalized(m_isolate, "clearBreakpoints")));
     v8::Debug::Call(debuggerContext(), clearBreakpoints).ToLocalChecked();
 }
 
-void V8InspectorImpl::setBreakpointsActivated(bool activated)
+void V8Debugger::setBreakpointsActivated(bool activated)
 {
     if (!enabled()) {
         NOTREACHED();
         return;
     }
     v8::HandleScope scope(m_isolate);
     v8::Context::Scope contextScope(debuggerContext());
 
     v8::Local<v8::Object> info = v8::Object::New(m_isolate);
-    info->Set(v8InternalizedString("enabled"), v8::Boolean::New(m_isolate, activated));
-    v8::Local<v8::Function> setBreakpointsActivated = v8::Local<v8::Function>::Cast(m_debuggerScript.Get(m_isolate)->Get(v8InternalizedString("setBreakpointsActivated")));
+    info->Set(toV8StringInternalized(m_isolate, "enabled"), v8::Boolean::New(m_isolate, activated));
+    v8::Local<v8::Function> setBreakpointsActivated = v8::Local<v8::Function>::Cast(m_debuggerScript.Get(m_isolate)->Get(toV8StringInternalized(m_isolate, "setBreakpointsActivated")));
     v8::Debug::Call(debuggerContext(), setBreakpointsActivated, info).ToLocalChecked();
 
     m_breakpointsActivated = activated;
 }
 
-V8InspectorImpl::PauseOnExceptionsState V8InspectorImpl::getPauseOnExceptionsState()
+V8Debugger::PauseOnExceptionsState V8Debugger::getPauseOnExceptionsState()
 {
     DCHECK(enabled());
     v8::HandleScope scope(m_isolate);
     v8::Context::Scope contextScope(debuggerContext());
 
     v8::Local<v8::Value> argv[] = { v8::Undefined(m_isolate) };
     v8::Local<v8::Value> result = callDebuggerMethod("pauseOnExceptionsState", 0, argv).ToLocalChecked();
-    return static_cast<V8InspectorImpl::PauseOnExceptionsState>(result->Int32Value());
+    return static_cast<V8Debugger::PauseOnExceptionsState>(result->Int32Value());
 }
 
-void V8InspectorImpl::setPauseOnExceptionsState(PauseOnExceptionsState pauseOnExceptionsState)
+void V8Debugger::setPauseOnExceptionsState(PauseOnExceptionsState pauseOnExceptionsState)
 {
     DCHECK(enabled());
     v8::HandleScope scope(m_isolate);
     v8::Context::Scope contextScope(debuggerContext());
 
     v8::Local<v8::Value> argv[] = { v8::Int32::New(m_isolate, pauseOnExceptionsState) };
     callDebuggerMethod("setPauseOnExceptionsState", 1, argv);
 }
 
-void V8InspectorImpl::setPauseOnNextStatement(bool pause)
+void V8Debugger::setPauseOnNextStatement(bool pause)
 {
     if (m_runningNestedMessageLoop)
         return;
     if (pause)
         v8::Debug::DebugBreak(m_isolate);
     else
         v8::Debug::CancelDebugBreak(m_isolate);
 }
 
-bool V8InspectorImpl::canBreakProgram()
+bool V8Debugger::canBreakProgram()
 {
     if (!m_breakpointsActivated)
         return false;
     return m_isolate->InContext();
 }
 
-void V8InspectorImpl::breakProgram()
+void V8Debugger::breakProgram()
 {
     if (isPaused()) {
         DCHECK(!m_runningNestedMessageLoop);
         v8::Local<v8::Value> exception;
         v8::Local<v8::Array> hitBreakpoints;
         handleProgramBreak(m_pausedContext, m_executionState, exception, hitBreakpoints);
         return;
     }
 
     if (!canBreakProgram())
         return;
 
     v8::HandleScope scope(m_isolate);
     v8::Local<v8::Function> breakFunction;
-    if (!v8::Function::New(m_isolate->GetCurrentContext(), &V8InspectorImpl::breakProgramCallback, v8::External::New(m_isolate, this), 0, v8::ConstructorBehavior::kThrow).ToLocal(&breakFunction))
+    if (!v8::Function::New(m_isolate->GetCurrentContext(), &V8Debugger::breakProgramCallback, v8::External::New(m_isolate, this), 0, v8::ConstructorBehavior::kThrow).ToLocal(&breakFunction))
         return;
     v8::Debug::Call(debuggerContext(), breakFunction).ToLocalChecked();
 }
 
-void V8InspectorImpl::continueProgram()
+void V8Debugger::continueProgram()
 {
     if (isPaused())
-        m_client->quitMessageLoopOnPause();
+        m_inspector->client()->quitMessageLoopOnPause();
     m_pausedContext.Clear();
     m_executionState.Clear();
 }
 
-void V8InspectorImpl::stepIntoStatement()
+void V8Debugger::stepIntoStatement()
 {
     DCHECK(isPaused());
     DCHECK(!m_executionState.IsEmpty());
     v8::HandleScope handleScope(m_isolate);
     v8::Local<v8::Value> argv[] = { m_executionState };
     callDebuggerMethod(stepIntoV8MethodName, 1, argv);
     continueProgram();
 }
 
-void V8InspectorImpl::stepOverStatement()
+void V8Debugger::stepOverStatement()
 {
     DCHECK(isPaused());
     DCHECK(!m_executionState.IsEmpty());
     v8::HandleScope handleScope(m_isolate);
     v8::Local<v8::Value> argv[] = { m_executionState };
     callDebuggerMethod("stepOverStatement", 1, argv);
     continueProgram();
 }
 
-void V8InspectorImpl::stepOutOfFunction()
+void V8Debugger::stepOutOfFunction()
 {
     DCHECK(isPaused());
     DCHECK(!m_executionState.IsEmpty());
     v8::HandleScope handleScope(m_isolate);
     v8::Local<v8::Value> argv[] = { m_executionState };
     callDebuggerMethod(stepOutV8MethodName, 1, argv);
     continueProgram();
 }
 
-void V8InspectorImpl::clearStepping()
+void V8Debugger::clearStepping()
 {
     DCHECK(enabled());
     v8::HandleScope scope(m_isolate);
     v8::Context::Scope contextScope(debuggerContext());
 
     v8::Local<v8::Value> argv[] = { v8::Undefined(m_isolate) };
     callDebuggerMethod("clearStepping", 0, argv);
 }
 
-bool V8InspectorImpl::setScriptSource(const String16& sourceID, v8::Local<v8::String> newSource, bool preview, ErrorString* error, Maybe<protocol::Runtime::ExceptionDetails>* exceptionDetails, JavaScriptCallFrames* newCallFrames, Maybe<bool>* stackChanged)
+bool V8Debugger::setScriptSource(const String16& sourceID, v8::Local<v8::String> newSource, bool preview, ErrorString* error, Maybe<protocol::Runtime::ExceptionDetails>* exceptionDetails, JavaScriptCallFrames* newCallFrames, Maybe<bool>* stackChanged)
 {
     class EnableLiveEditScope {
     public:
         explicit EnableLiveEditScope(v8::Isolate* isolate) : m_isolate(isolate)
         {
             v8::Debug::SetLiveEditEnabled(m_isolate, true);
             inLiveEditScope = true;
         }
         ~EnableLiveEditScope()
         {
@@ skipping 51 matching lines @@
                 .setScriptId(String16("0"))
                 .setLineNumber(resultTuple->Get(3)->ToInteger(m_isolate)->Value() - 1)
                 .setColumnNumber(resultTuple->Get(4)->ToInteger(m_isolate)->Value() - 1).build();
             return false;
         }
     }
     *error = "Unknown error.";
     return false;
 }
 
-JavaScriptCallFrames V8InspectorImpl::currentCallFrames(int limit)
+JavaScriptCallFrames V8Debugger::currentCallFrames(int limit)
 {
     if (!m_isolate->InContext())
         return JavaScriptCallFrames();
     v8::Local<v8::Value> currentCallFramesV8;
     if (m_executionState.IsEmpty()) {
-        v8::Local<v8::Function> currentCallFramesFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.Get(m_isolate)->Get(v8InternalizedString("currentCallFrames")));
+        v8::Local<v8::Function> currentCallFramesFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.Get(m_isolate)->Get(toV8StringInternalized(m_isolate, "currentCallFrames")));
         currentCallFramesV8 = v8::Debug::Call(debuggerContext(), currentCallFramesFunction, v8::Integer::New(m_isolate, limit)).ToLocalChecked();
     } else {
         v8::Local<v8::Value> argv[] = { m_executionState, v8::Integer::New(m_isolate, limit) };
         currentCallFramesV8 = callDebuggerMethod("currentCallFrames", PROTOCOL_ARRAY_LENGTH(argv), argv).ToLocalChecked();
     }
     DCHECK(!currentCallFramesV8.IsEmpty());
     if (!currentCallFramesV8->IsArray())
         return JavaScriptCallFrames();
     v8::Local<v8::Array> callFramesArray = currentCallFramesV8.As<v8::Array>();
     JavaScriptCallFrames callFrames;
     for (size_t i = 0; i < callFramesArray->Length(); ++i) {
         v8::Local<v8::Value> callFrameValue;
         if (!callFramesArray->Get(debuggerContext(), i).ToLocal(&callFrameValue))
             return JavaScriptCallFrames();
         if (!callFrameValue->IsObject())
             return JavaScriptCallFrames();
         v8::Local<v8::Object> callFrameObject = callFrameValue.As<v8::Object>();
         callFrames.push_back(JavaScriptCallFrame::create(debuggerContext(), v8::Local<v8::Object>::Cast(callFrameObject)));
     }
     return callFrames;
 }
 
-static V8InspectorImpl* toV8InspectorImpl(v8::Local<v8::Value> data)
+static V8Debugger* toV8Debugger(v8::Local<v8::Value> data)
 {
     void* p = v8::Local<v8::External>::Cast(data)->Value();
-    return static_cast<V8InspectorImpl*>(p);
+    return static_cast<V8Debugger*>(p);
 }
 
-void V8InspectorImpl::breakProgramCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
+void V8Debugger::breakProgramCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     DCHECK_EQ(info.Length(), 2);
-    V8InspectorImpl* thisPtr = toV8InspectorImpl(info.Data());
+    V8Debugger* thisPtr = toV8Debugger(info.Data());
     if (!thisPtr->enabled())
         return;
     v8::Local<v8::Context> pausedContext = thisPtr->m_isolate->GetCurrentContext();
     v8::Local<v8::Value> exception;
     v8::Local<v8::Array> hitBreakpoints;
     thisPtr->handleProgramBreak(pausedContext, v8::Local<v8::Object>::Cast(info[0]), exception, hitBreakpoints);
 }
 
-void V8InspectorImpl::handleProgramBreak(v8::Local<v8::Context> pausedContext, v8::Local<v8::Object> executionState, v8::Local<v8::Value> exception, v8::Local<v8::Array> hitBreakpointNumbers, bool isPromiseRejection)
+void V8Debugger::handleProgramBreak(v8::Local<v8::Context> pausedContext, v8::Local<v8::Object> executionState, v8::Local<v8::Value> exception, v8::Local<v8::Array> hitBreakpointNumbers, bool isPromiseRejection)
 {
     // Don't allow nested breaks.
     if (m_runningNestedMessageLoop)
         return;
 
-    V8DebuggerAgentImpl* agent = findEnabledDebuggerAgent(pausedContext);
+    V8DebuggerAgentImpl* agent = m_inspector->enabledDebuggerAgentForGroup(getGroupId(pausedContext));
     if (!agent)
         return;
 
     std::vector<String16> breakpointIds;
     if (!hitBreakpointNumbers.IsEmpty()) {
         breakpointIds.reserve(hitBreakpointNumbers->Length());
         for (size_t i = 0; i < hitBreakpointNumbers->Length(); i++) {
             v8::Local<v8::Value> hitBreakpointNumber = hitBreakpointNumbers->Get(i);
             DCHECK(!hitBreakpointNumber.IsEmpty() && hitBreakpointNumber->IsInt32());
             breakpointIds.push_back(String16::fromInteger(hitBreakpointNumber->Int32Value()));
         }
     }
 
     m_pausedContext = pausedContext;
     m_executionState = executionState;
     V8DebuggerAgentImpl::SkipPauseRequest result = agent->didPause(pausedContext, exception, breakpointIds, isPromiseRejection);
     if (result == V8DebuggerAgentImpl::RequestNoSkip) {
         m_runningNestedMessageLoop = true;
         int groupId = getGroupId(pausedContext);
         DCHECK(groupId);
-        m_client->runMessageLoopOnPause(groupId);
+        m_inspector->client()->runMessageLoopOnPause(groupId);
         // The agent may have been removed in the nested loop.
-        agent = findEnabledDebuggerAgent(pausedContext);
+        agent = m_inspector->enabledDebuggerAgentForGroup(getGroupId(pausedContext));
         if (agent)
             agent->didContinue();
         m_runningNestedMessageLoop = false;
     }
     m_pausedContext.Clear();
     m_executionState.Clear();
 
     if (result == V8DebuggerAgentImpl::RequestStepFrame) {
         v8::Local<v8::Value> argv[] = { executionState };
         callDebuggerMethod("stepFrameStatement", 1, argv);
     } else if (result == V8DebuggerAgentImpl::RequestStepInto) {
         v8::Local<v8::Value> argv[] = { executionState };
         callDebuggerMethod(stepIntoV8MethodName, 1, argv);
     } else if (result == V8DebuggerAgentImpl::RequestStepOut) {
         v8::Local<v8::Value> argv[] = { executionState };
         callDebuggerMethod(stepOutV8MethodName, 1, argv);
     }
 }
 
-void V8InspectorImpl::v8DebugEventCallback(const v8::Debug::EventDetails& eventDetails)
+void V8Debugger::v8DebugEventCallback(const v8::Debug::EventDetails& eventDetails)
 {
-    V8InspectorImpl* thisPtr = toV8InspectorImpl(eventDetails.GetCallbackData());
+    V8Debugger* thisPtr = toV8Debugger(eventDetails.GetCallbackData());
     thisPtr->handleV8DebugEvent(eventDetails);
 }
 
-v8::Local<v8::Value> V8InspectorImpl::callInternalGetterFunction(v8::Local<v8::Object> object, const char* functionName)
+v8::Local<v8::Value> V8Debugger::callInternalGetterFunction(v8::Local<v8::Object> object, const char* functionName)
 {
     v8::MicrotasksScope microtasks(m_isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
-    v8::Local<v8::Value> getterValue = object->Get(v8InternalizedString(functionName));
+    v8::Local<v8::Value> getterValue = object->Get(toV8StringInternalized(m_isolate, functionName));
     DCHECK(!getterValue.IsEmpty() && getterValue->IsFunction());
     return v8::Local<v8::Function>::Cast(getterValue)->Call(m_isolate->GetCurrentContext(), object, 0, 0).ToLocalChecked();
 }
 
-void V8InspectorImpl::handleV8DebugEvent(const v8::Debug::EventDetails& eventDetails)
+void V8Debugger::handleV8DebugEvent(const v8::Debug::EventDetails& eventDetails)
 {
     if (!enabled())
         return;
     v8::DebugEvent event = eventDetails.GetEvent();
     if (event != v8::AsyncTaskEvent && event != v8::Break && event != v8::Exception && event != v8::AfterCompile && event != v8::BeforeCompile && event != v8::CompileError)
         return;
 
     v8::Local<v8::Context> eventContext = eventDetails.GetEventContext();
     DCHECK(!eventContext.IsEmpty());
 
     if (event == v8::AsyncTaskEvent) {
         v8::HandleScope scope(m_isolate);
         handleV8AsyncTaskEvent(eventContext, eventDetails.GetExecutionState(), eventDetails.GetEventData());
         return;
     }
 
-    V8DebuggerAgentImpl* agent = findEnabledDebuggerAgent(eventContext);
+    V8DebuggerAgentImpl* agent = m_inspector->enabledDebuggerAgentForGroup(getGroupId(eventContext));
     if (agent) {
         v8::HandleScope scope(m_isolate);
         if (event == v8::AfterCompile || event == v8::CompileError) {
             v8::Context::Scope contextScope(debuggerContext());
             v8::Local<v8::Value> argv[] = { eventDetails.GetEventData() };
             v8::Local<v8::Value> value = callDebuggerMethod("getAfterCompileScript", 1, argv).ToLocalChecked();
             DCHECK(value->IsObject());
             v8::Local<v8::Object> scriptObject = v8::Local<v8::Object>::Cast(value);
             agent->didParseSource(wrapUnique(new V8DebuggerScript(m_isolate, scriptObject, inLiveEditScope)), event == v8::AfterCompile);
         } else if (event == v8::Exception) {
             v8::Local<v8::Object> eventData = eventDetails.GetEventData();
             v8::Local<v8::Value> exception = callInternalGetterFunction(eventData, "exception");
             v8::Local<v8::Value> promise = callInternalGetterFunction(eventData, "promise");
             bool isPromiseRejection = !promise.IsEmpty() && promise->IsObject();
             handleProgramBreak(eventContext, eventDetails.GetExecutionState(), exception, v8::Local<v8::Array>(), isPromiseRejection);
         } else if (event == v8::Break) {
             v8::Local<v8::Value> argv[] = { eventDetails.GetEventData() };
             v8::Local<v8::Value> hitBreakpoints = callDebuggerMethod("getBreakpointNumbers", 1, argv).ToLocalChecked();
             DCHECK(hitBreakpoints->IsArray());
             handleProgramBreak(eventContext, eventDetails.GetExecutionState(), v8::Local<v8::Value>(), hitBreakpoints.As<v8::Array>());
         }
     }
 }
 
-void V8InspectorImpl::handleV8AsyncTaskEvent(v8::Local<v8::Context> context, v8::Local<v8::Object> executionState, v8::Local<v8::Object> eventData)
+void V8Debugger::handleV8AsyncTaskEvent(v8::Local<v8::Context> context, v8::Local<v8::Object> executionState, v8::Local<v8::Object> eventData)
 {
     if (!m_maxAsyncCallStackDepth)
         return;
 
     String16 type = toProtocolStringWithTypeCheck(callInternalGetterFunction(eventData, "type"));
     String16 name = toProtocolStringWithTypeCheck(callInternalGetterFunction(eventData, "name"));
     int id = callInternalGetterFunction(eventData, "id")->ToInteger(m_isolate)->Value();
     // The scopes for the ids are defined by the eventData.name namespaces. There are currently two namespaces: "Object." and "Promise.".
     void* ptr = reinterpret_cast<void*>(id * 4 + (name[0] == 'P' ? 2 : 0) + 1);
     if (type == v8AsyncTaskEventEnqueue)
         asyncTaskScheduled(name, ptr, false);
     else if (type == v8AsyncTaskEventWillHandle)
         asyncTaskStarted(ptr);
     else if (type == v8AsyncTaskEventDidHandle)
         asyncTaskFinished(ptr);
     else
         NOTREACHED();
 }
 
-V8StackTraceImpl* V8InspectorImpl::currentAsyncCallChain()
+V8StackTraceImpl* V8Debugger::currentAsyncCallChain()
 {
     if (!m_currentStacks.size())
         return nullptr;
     return m_currentStacks.back().get();
 }
 
-void V8InspectorImpl::compileDebuggerScript()
+void V8Debugger::compileDebuggerScript()
 {
     if (!m_debuggerScript.IsEmpty()) {
         NOTREACHED();
         return;
     }
 
     v8::HandleScope scope(m_isolate);
     v8::Context::Scope contextScope(debuggerContext());
 
     v8::Local<v8::String> scriptValue = v8::String::NewFromUtf8(m_isolate, DebuggerScript_js, v8::NewStringType::kInternalized, sizeof(DebuggerScript_js)).ToLocalChecked();
     v8::Local<v8::Value> value;
-    if (!compileAndRunInternalScript(debuggerContext(), scriptValue).ToLocal(&value)) {
+    if (!m_inspector->compileAndRunInternalScript(debuggerContext(), scriptValue).ToLocal(&value)) {
         NOTREACHED();
         return;
     }
     DCHECK(value->IsObject());
     m_debuggerScript.Reset(m_isolate, value.As<v8::Object>());
 }
 
-v8::Local<v8::Context> V8InspectorImpl::debuggerContext() const
+v8::Local<v8::Context> V8Debugger::debuggerContext() const
 {
     DCHECK(!m_debuggerContext.IsEmpty());
     return m_debuggerContext.Get(m_isolate);
 }
 
-v8::Local<v8::String> V8InspectorImpl::v8InternalizedString(const char* str) const
-{
-    return v8::String::NewFromUtf8(m_isolate, str, v8::NewStringType::kInternalized).ToLocalChecked();
-}
-
-v8::MaybeLocal<v8::Value> V8InspectorImpl::functionScopes(v8::Local<v8::Function> function)
+v8::MaybeLocal<v8::Value> V8Debugger::functionScopes(v8::Local<v8::Function> function)
 {
     if (!enabled()) {
         NOTREACHED();
         return v8::Local<v8::Value>::New(m_isolate, v8::Undefined(m_isolate));
     }
     v8::Local<v8::Value> argv[] = { function };
     v8::Local<v8::Value> scopesValue;
     if (!callDebuggerMethod("getFunctionScopes", 1, argv).ToLocal(&scopesValue) || !scopesValue->IsArray())
         return v8::MaybeLocal<v8::Value>();
     v8::Local<v8::Array> scopes = scopesValue.As<v8::Array>();
     v8::Local<v8::Context> context = m_debuggerContext.Get(m_isolate);
     if (!markAsInternal(context, scopes, V8InternalValueType::kScopeList))
         return v8::MaybeLocal<v8::Value>();
     if (!markArrayEntriesAsInternal(context, scopes, V8InternalValueType::kScope))
         return v8::MaybeLocal<v8::Value>();
     if (!scopes->SetPrototype(context, v8::Null(m_isolate)).FromMaybe(false))
         return v8::Undefined(m_isolate);
     return scopes;
 }
 
-v8::MaybeLocal<v8::Array> V8InspectorImpl::internalProperties(v8::Local<v8::Context> context, v8::Local<v8::Value> value)
+v8::MaybeLocal<v8::Array> V8Debugger::internalProperties(v8::Local<v8::Context> context, v8::Local<v8::Value> value)
 {
     v8::Local<v8::Array> properties;
     if (!v8::Debug::GetInternalProperties(m_isolate, value).ToLocal(&properties))
         return v8::MaybeLocal<v8::Array>();
     if (value->IsFunction()) {
         v8::Local<v8::Function> function = value.As<v8::Function>();
         v8::Local<v8::Value> location = functionLocation(context, function);
         if (location->IsObject()) {
-            properties->Set(properties->Length(), v8InternalizedString("[[FunctionLocation]]"));
+            properties->Set(properties->Length(), toV8StringInternalized(m_isolate, "[[FunctionLocation]]"));
             properties->Set(properties->Length(), location);
         }
         if (function->IsGeneratorFunction()) {
-            properties->Set(properties->Length(), v8InternalizedString("[[IsGenerator]]"));
+            properties->Set(properties->Length(), toV8StringInternalized(m_isolate, "[[IsGenerator]]"));
             properties->Set(properties->Length(), v8::True(m_isolate));
         }
     }
     if (!enabled())
         return properties;
     if (value->IsMap() || value->IsWeakMap() || value->IsSet() || value->IsWeakSet() || value->IsSetIterator() || value->IsMapIterator()) {
         v8::Local<v8::Value> entries = collectionEntries(context, v8::Local<v8::Object>::Cast(value));
         if (entries->IsArray()) {
-            properties->Set(properties->Length(), v8InternalizedString("[[Entries]]"));
+            properties->Set(properties->Length(), toV8StringInternalized(m_isolate, "[[Entries]]"));
             properties->Set(properties->Length(), entries);
         }
     }
     if (value->IsGeneratorObject()) {
         v8::Local<v8::Value> location = generatorObjectLocation(v8::Local<v8::Object>::Cast(value));
         if (location->IsObject()) {
-            properties->Set(properties->Length(), v8InternalizedString("[[GeneratorLocation]]"));
+            properties->Set(properties->Length(), toV8StringInternalized(m_isolate, "[[GeneratorLocation]]"));
             properties->Set(properties->Length(), location);
         }
     }
     if (value->IsFunction()) {
         v8::Local<v8::Function> function = value.As<v8::Function>();
         v8::Local<v8::Value> boundFunction = function->GetBoundFunction();
         v8::Local<v8::Value> scopes;
         if (boundFunction->IsUndefined() && functionScopes(function).ToLocal(&scopes)) {
-            properties->Set(properties->Length(), v8InternalizedString("[[Scopes]]"));
+            properties->Set(properties->Length(), toV8StringInternalized(m_isolate, "[[Scopes]]"));
             properties->Set(properties->Length(), scopes);
         }
     }
     return properties;
 }
 
-v8::Local<v8::Value> V8InspectorImpl::collectionEntries(v8::Local<v8::Context> context, v8::Local<v8::Object> object)
+v8::Local<v8::Value> V8Debugger::collectionEntries(v8::Local<v8::Context> context, v8::Local<v8::Object> object)
 {
     if (!enabled()) {
         NOTREACHED();
         return v8::Undefined(m_isolate);
     }
     v8::Local<v8::Value> argv[] = { object };
     v8::Local<v8::Value> entriesValue = callDebuggerMethod("getCollectionEntries", 1, argv).ToLocalChecked();
     if (!entriesValue->IsArray())
         return v8::Undefined(m_isolate);
     v8::Local<v8::Array> entries = entriesValue.As<v8::Array>();
     if (!markArrayEntriesAsInternal(context, entries, V8InternalValueType::kEntry))
         return v8::Undefined(m_isolate);
     if (!entries->SetPrototype(context, v8::Null(m_isolate)).FromMaybe(false))
         return v8::Undefined(m_isolate);
     return entries;
 }
 
-v8::Local<v8::Value> V8InspectorImpl::generatorObjectLocation(v8::Local<v8::Object> object)
+v8::Local<v8::Value> V8Debugger::generatorObjectLocation(v8::Local<v8::Object> object)
 {
     if (!enabled()) {
         NOTREACHED();
         return v8::Null(m_isolate);
     }
     v8::Local<v8::Value> argv[] = { object };
     v8::Local<v8::Value> location = callDebuggerMethod("getGeneratorObjectLocation", 1, argv).ToLocalChecked();
     if (!location->IsObject())
         return v8::Null(m_isolate);
     v8::Local<v8::Context> context = m_debuggerContext.Get(m_isolate);
     if (!markAsInternal(context, v8::Local<v8::Object>::Cast(location), V8InternalValueType::kLocation))
         return v8::Null(m_isolate);
     return location;
 }
 
-v8::Local<v8::Value> V8InspectorImpl::functionLocation(v8::Local<v8::Context> context, v8::Local<v8::Function> function)
+v8::Local<v8::Value> V8Debugger::functionLocation(v8::Local<v8::Context> context, v8::Local<v8::Function> function)
 {
     int scriptId = function->ScriptId();
     if (scriptId == v8::UnboundScript::kNoScriptId)
         return v8::Null(m_isolate);
     int lineNumber = function->GetScriptLineNumber();
     int columnNumber = function->GetScriptColumnNumber();
     if (lineNumber == v8::Function::kLineOffsetNotFound || columnNumber == v8::Function::kLineOffsetNotFound)
         return v8::Null(m_isolate);
     v8::Local<v8::Object> location = v8::Object::New(m_isolate);
-    if (!location->Set(context, v8InternalizedString("scriptId"), toV8String(m_isolate, String16::fromInteger(scriptId))).FromMaybe(false))
+    if (!location->Set(context, toV8StringInternalized(m_isolate, "scriptId"), toV8String(m_isolate, String16::fromInteger(scriptId))).FromMaybe(false))
         return v8::Null(m_isolate);
-    if (!location->Set(context, v8InternalizedString("lineNumber"), v8::Integer::New(m_isolate, lineNumber)).FromMaybe(false))
+    if (!location->Set(context, toV8StringInternalized(m_isolate, "lineNumber"), v8::Integer::New(m_isolate, lineNumber)).FromMaybe(false))
         return v8::Null(m_isolate);
-    if (!location->Set(context, v8InternalizedString("columnNumber"), v8::Integer::New(m_isolate, columnNumber)).FromMaybe(false))
+    if (!location->Set(context, toV8StringInternalized(m_isolate, "columnNumber"), v8::Integer::New(m_isolate, columnNumber)).FromMaybe(false))
         return v8::Null(m_isolate);
     if (!markAsInternal(context, location, V8InternalValueType::kLocation))
         return v8::Null(m_isolate);
     return location;
 }
 
-bool V8InspectorImpl::isPaused()
+bool V8Debugger::isPaused()
 {
     return !m_pausedContext.IsEmpty();
 }
 
-v8::MaybeLocal<v8::Value> V8InspectorImpl::runCompiledScript(v8::Local<v8::Context> context, v8::Local<v8::Script> script)
-{
-    // TODO(dgozman): get rid of this check.
-    if (!m_client->isExecutionAllowed())
-        return v8::MaybeLocal<v8::Value>();
-
-    v8::MicrotasksScope microtasksScope(m_isolate, v8::MicrotasksScope::kRunMicrotasks);
-    int groupId = getGroupId(context);
-    if (V8DebuggerAgentImpl* agent = findEnabledDebuggerAgent(groupId))
-        agent->willExecuteScript(script->GetUnboundScript()->GetId());
-    v8::MaybeLocal<v8::Value> result = script->Run(context);
-    // Get agent from the map again, since it could have detached during script execution.
-    if (V8DebuggerAgentImpl* agent = findEnabledDebuggerAgent(groupId))
-        agent->didExecuteScript();
-    return result;
-}
-
-v8::MaybeLocal<v8::Value> V8InspectorImpl::callFunction(v8::Local<v8::Function> function, v8::Local<v8::Context> context, v8::Local<v8::Value> receiver, int argc, v8::Local<v8::Value> info[])
-{
-    // TODO(dgozman): get rid of this check.
-    if (!m_client->isExecutionAllowed())
-        return v8::MaybeLocal<v8::Value>();
-
-    v8::MicrotasksScope microtasksScope(m_isolate, v8::MicrotasksScope::kRunMicrotasks);
-    int groupId = getGroupId(context);
-    if (V8DebuggerAgentImpl* agent = findEnabledDebuggerAgent(groupId))
-        agent->willExecuteScript(function->ScriptId());
-    v8::MaybeLocal<v8::Value> result = function->Call(context, receiver, argc, info);
-    // Get agent from the map again, since it could have detached during script execution.
-    if (V8DebuggerAgentImpl* agent = findEnabledDebuggerAgent(groupId))
-        agent->didExecuteScript();
-    return result;
-}
-
-v8::MaybeLocal<v8::Value> V8InspectorImpl::compileAndRunInternalScript(v8::Local<v8::Context> context, v8::Local<v8::String> source)
-{
-    v8::Local<v8::Script> script = compileScript(context, source, String(), true);
-    if (script.IsEmpty())
-        return v8::MaybeLocal<v8::Value>();
-    v8::MicrotasksScope microtasksScope(m_isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
-    return script->Run(context);
-}
-
-v8::Local<v8::Script> V8InspectorImpl::compileScript(v8::Local<v8::Context> context, v8::Local<v8::String> code, const String16& fileName, bool markAsInternal)
-{
-    v8::ScriptOrigin origin(
-        toV8String(m_isolate, fileName),
-        v8::Integer::New(m_isolate, 0),
-        v8::Integer::New(m_isolate, 0),
-        v8::False(m_isolate), // sharable
-        v8::Local<v8::Integer>(),
-        v8::Boolean::New(m_isolate, markAsInternal), // internal
-        toV8String(m_isolate, String16()), // sourceMap
-        v8::True(m_isolate)); // opaqueresource
-    v8::ScriptCompiler::Source source(code, origin);
-    v8::Local<v8::Script> script;
-    if (!v8::ScriptCompiler::Compile(context, &source, v8::ScriptCompiler::kNoCompileOptions).ToLocal(&script))
-        return v8::Local<v8::Script>();
-    return script;
-}
-
-void V8InspectorImpl::enableStackCapturingIfNeeded()
-{
-    if (!m_capturingStackTracesCount)
-        V8StackTraceImpl::setCaptureStackTraceForUncaughtExceptions(m_isolate, true);
-    ++m_capturingStackTracesCount;
-}
-
-void V8InspectorImpl::disableStackCapturingIfNeeded()
-{
-    if (!(--m_capturingStackTracesCount))
-        V8StackTraceImpl::setCaptureStackTraceForUncaughtExceptions(m_isolate, false);
-}
-
-V8ConsoleMessageStorage* V8InspectorImpl::ensureConsoleMessageStorage(int contextGroupId)
-{
-    ConsoleStorageMap::iterator storageIt = m_consoleStorageMap.find(contextGroupId);
-    if (storageIt == m_consoleStorageMap.end())
-        storageIt = m_consoleStorageMap.insert(std::make_pair(contextGroupId, wrapUnique(new V8ConsoleMessageStorage(this, contextGroupId)))).first;
-    return storageIt->second.get();
-}
-
-std::unique_ptr<V8StackTrace> V8InspectorImpl::createStackTrace(v8::Local<v8::StackTrace> stackTrace)
-{
-    return createStackTraceImpl(stackTrace);
-}
-
-std::unique_ptr<V8StackTraceImpl> V8InspectorImpl::createStackTraceImpl(v8::Local<v8::StackTrace> stackTrace)
+std::unique_ptr<V8StackTraceImpl> V8Debugger::createStackTrace(v8::Local<v8::StackTrace> stackTrace)
 {
     int contextGroupId = m_isolate->InContext() ? getGroupId(m_isolate->GetCurrentContext()) : 0;
     return V8StackTraceImpl::create(this, contextGroupId, stackTrace, V8StackTraceImpl::maxCallStackSizeToCapture);
 }
 
-std::unique_ptr<V8InspectorSession> V8InspectorImpl::connect(int contextGroupId, protocol::FrontendChannel* channel, V8InspectorSessionClient* client, const String16* state)
+int V8Debugger::markContext(const V8ContextInfo& info)
 {
-    DCHECK(m_sessions.find(contextGroupId) == m_sessions.cend());
-    std::unique_ptr<V8InspectorSessionImpl> session =
-        V8InspectorSessionImpl::create(this, contextGroupId, channel, client, state);
-    m_sessions[contextGroupId] = session.get();
-    return std::move(session);
+    DCHECK(info.context->GetIsolate() == m_isolate);
+    int contextId = ++m_lastContextId;
+    String16 debugData = String16::fromInteger(info.contextGroupId) + "," + String16::fromInteger(contextId) + "," + (info.isDefault ? "default" : "nondefault");
+    v8::Context::Scope contextScope(info.context);
+    info.context->SetEmbedderData(static_cast<int>(v8::Context::kDebugIdIndex), toV8String(m_isolate, debugData));
+    return contextId;
 }
 
-void V8InspectorImpl::disconnect(V8InspectorSessionImpl* session)
-{
-    DCHECK(m_sessions.find(session->contextGroupId()) != m_sessions.end());
-    m_sessions.erase(session->contextGroupId());
-}
-
-InspectedContext* V8InspectorImpl::getContext(int groupId, int contextId) const
-{
-    ContextsByGroupMap::const_iterator contextGroupIt = m_contexts.find(groupId);
-    if (contextGroupIt == m_contexts.end())
-        return nullptr;
-
-    ContextByIdMap::iterator contextIt = contextGroupIt->second->find(contextId);
-    if (contextIt == contextGroupIt->second->end())
-        return nullptr;
-
-    return contextIt->second.get();
-}
-
-void V8InspectorImpl::contextCreated(const V8ContextInfo& info)
-{
-    DCHECK(info.context->GetIsolate() == m_isolate);
-    // TODO(dgozman): make s_lastContextId non-static.
-    int contextId = atomicIncrement(&s_lastContextId);
-    String16 debugData = String16::fromInteger(info.contextGroupId) + "," + String16::fromInteger(contextId) + "," + (info.isDefault ? "default" : "nondefault");
-    v8::HandleScope scope(m_isolate);
-    v8::Context::Scope contextScope(info.context);
-    info.context->SetEmbedderData(static_cast<int>(v8::Context::kDebugIdIndex), toV8String(m_isolate, debugData));
-
-    ContextsByGroupMap::iterator contextIt = m_contexts.find(info.contextGroupId);
-    if (contextIt == m_contexts.end())
-        contextIt = m_contexts.insert(std::make_pair(info.contextGroupId, wrapUnique(new ContextByIdMap()))).first;
-
-    const auto& contextById = contextIt->second;
-
-    DCHECK(contextById->find(contextId) == contextById->cend());
-    InspectedContext* context = new InspectedContext(this, info, contextId);
-    (*contextById)[contextId] = wrapUnique(context);
-    SessionMap::iterator sessionIt = m_sessions.find(info.contextGroupId);
-    if (sessionIt != m_sessions.end())
-        sessionIt->second->runtimeAgent()->reportExecutionContextCreated(context);
-}
-
-void V8InspectorImpl::contextDestroyed(v8::Local<v8::Context> context)
-{
-    int contextId = V8InspectorImpl::contextId(context);
-    int contextGroupId = getGroupId(context);
-
-    ConsoleStorageMap::iterator storageIt = m_consoleStorageMap.find(contextGroupId);
-    if (storageIt != m_consoleStorageMap.end())
-        storageIt->second->contextDestroyed(contextId);
-
-    InspectedContext* inspectedContext = getContext(contextGroupId, contextId);
-    if (!inspectedContext)
-        return;
-
-    SessionMap::iterator iter = m_sessions.find(contextGroupId);
-    if (iter != m_sessions.end())
-        iter->second->runtimeAgent()->reportExecutionContextDestroyed(inspectedContext);
-    discardInspectedContext(contextGroupId, contextId);
-}
-
-void V8InspectorImpl::resetContextGroup(int contextGroupId)
-{
-    m_consoleStorageMap.erase(contextGroupId);
-    SessionMap::iterator session = m_sessions.find(contextGroupId);
-    if (session != m_sessions.end())
-        session->second->reset();
-    m_contexts.erase(contextGroupId);
-}
-
-void V8InspectorImpl::setAsyncCallStackDepth(V8DebuggerAgentImpl* agent, int depth)
+void V8Debugger::setAsyncCallStackDepth(V8DebuggerAgentImpl* agent, int depth)
 {
     if (depth <= 0)
         m_maxAsyncCallStackDepthMap.erase(agent);
     else
         m_maxAsyncCallStackDepthMap[agent] = depth;
 
     int maxAsyncCallStackDepth = 0;
     for (const auto& pair : m_maxAsyncCallStackDepthMap) {
         if (pair.second > maxAsyncCallStackDepth)
             maxAsyncCallStackDepth = pair.second;
     }
 
     if (m_maxAsyncCallStackDepth == maxAsyncCallStackDepth)
         return;
     m_maxAsyncCallStackDepth = maxAsyncCallStackDepth;
     if (!maxAsyncCallStackDepth)
         allAsyncTasksCanceled();
 }
 
-void V8InspectorImpl::asyncTaskScheduled(const String16& taskName, void* task, bool recurring)
+void V8Debugger::asyncTaskScheduled(const String16& taskName, void* task, bool recurring)
 {
     if (!m_maxAsyncCallStackDepth)
         return;
     v8::HandleScope scope(m_isolate);
     int contextGroupId = m_isolate->InContext() ? getGroupId(m_isolate->GetCurrentContext()) : 0;
     std::unique_ptr<V8StackTraceImpl> chain = V8StackTraceImpl::capture(this, contextGroupId, V8StackTraceImpl::maxCallStackSizeToCapture, taskName);
     if (chain) {
         m_asyncTaskStacks[task] = std::move(chain);
         if (recurring)
             m_recurringTasks.insert(task);
     }
 }
 
-void V8InspectorImpl::asyncTaskCanceled(void* task)
+void V8Debugger::asyncTaskCanceled(void* task)
 {
     if (!m_maxAsyncCallStackDepth)
         return;
     m_asyncTaskStacks.erase(task);
     m_recurringTasks.erase(task);
 }
 
-void V8InspectorImpl::asyncTaskStarted(void* task)
+void V8Debugger::asyncTaskStarted(void* task)
 {
     if (!m_maxAsyncCallStackDepth)
         return;
     m_currentTasks.push_back(task);
     AsyncTaskToStackTrace::iterator stackIt = m_asyncTaskStacks.find(task);
     // Needs to support following order of events:
     // - asyncTaskScheduled
     //   <-- attached here -->
     // - asyncTaskStarted
     // - asyncTaskCanceled <-- canceled before finished
     //   <-- async stack requested here -->
     // - asyncTaskFinished
     std::unique_ptr<V8StackTraceImpl> stack;
     if (stackIt != m_asyncTaskStacks.end() && stackIt->second)
         stack = stackIt->second->cloneImpl();
     m_currentStacks.push_back(std::move(stack));
 }
 
-void V8InspectorImpl::asyncTaskFinished(void* task)
+void V8Debugger::asyncTaskFinished(void* task)
 {
     if (!m_maxAsyncCallStackDepth)
         return;
     // We could start instrumenting half way and the stack is empty.
     if (!m_currentStacks.size())
         return;
 
     DCHECK(m_currentTasks.back() == task);
     m_currentTasks.pop_back();
 
     m_currentStacks.pop_back();
     if (m_recurringTasks.find(task) == m_recurringTasks.end())
         m_asyncTaskStacks.erase(task);
 }
 
-void V8InspectorImpl::allAsyncTasksCanceled()
+void V8Debugger::allAsyncTasksCanceled()
 {
     m_asyncTaskStacks.clear();
     m_recurringTasks.clear();
     m_currentStacks.clear();
     m_currentTasks.clear();
 }
 
-void V8InspectorImpl::willExecuteScript(v8::Local<v8::Context> context, int scriptId)
-{
-    if (V8DebuggerAgentImpl* agent = findEnabledDebuggerAgent(context))
-        agent->willExecuteScript(scriptId);
-}
-
-void V8InspectorImpl::didExecuteScript(v8::Local<v8::Context> context)
-{
-    if (V8DebuggerAgentImpl* agent = findEnabledDebuggerAgent(context))
-        agent->didExecuteScript();
-}
-
-void V8InspectorImpl::idleStarted()
-{
-    m_isolate->GetCpuProfiler()->SetIdle(true);
-}
-
-void V8InspectorImpl::idleFinished()
-{
-    m_isolate->GetCpuProfiler()->SetIdle(false);
-}
-
-unsigned V8InspectorImpl::exceptionThrown(v8::Local<v8::Context> context, const String16& message, v8::Local<v8::Value> exception, const String16& detailedMessage, const String16& url, unsigned lineNumber, unsigned columnNumber, std::unique_ptr<V8StackTrace> stackTrace, int scriptId)
-{
-    int contextGroupId = getGroupId(context);
-    if (!contextGroupId)
-        return 0;
-    std::unique_ptr<V8StackTraceImpl> stackTraceImpl = wrapUnique(static_cast<V8StackTraceImpl*>(stackTrace.release()));
-    unsigned exceptionId = ++m_lastExceptionId;
-    std::unique_ptr<V8ConsoleMessage> consoleMessage = V8ConsoleMessage::createForException(m_client->currentTimeMS(), detailedMessage, url, lineNumber, columnNumber, std::move(stackTraceImpl), scriptId, m_isolate, message, contextId(context), exception, exceptionId);
-    ensureConsoleMessageStorage(contextGroupId)->addMessage(std::move(consoleMessage));
-    return exceptionId;
-}
-
-void V8InspectorImpl::exceptionRevoked(v8::Local<v8::Context> context, unsigned exceptionId, const String16& message)
-{
-    int contextGroupId = getGroupId(context);
-    if (!contextGroupId)
-        return;
-
-    std::unique_ptr<V8ConsoleMessage> consoleMessage = V8ConsoleMessage::createForRevokedException(m_client->currentTimeMS(), message, exceptionId);
-    ensureConsoleMessageStorage(contextGroupId)->addMessage(std::move(consoleMessage));
-}
-
-std::unique_ptr<V8StackTrace> V8InspectorImpl::captureStackTrace(bool fullStack)
-{
-    return captureStackTraceImpl(fullStack);
-}
-
-std::unique_ptr<V8StackTraceImpl> V8InspectorImpl::captureStackTraceImpl(bool fullStack)
+std::unique_ptr<V8StackTraceImpl> V8Debugger::captureStackTrace(bool fullStack)
 {
     if (!m_isolate->InContext())
         return nullptr;
 
     v8::HandleScope handles(m_isolate);
     int contextGroupId = getGroupId(m_isolate->GetCurrentContext());
     if (!contextGroupId)
         return nullptr;
 
     size_t stackSize = fullStack ? V8StackTraceImpl::maxCallStackSizeToCapture : 1;
-    SessionMap::iterator sessionIt = m_sessions.find(contextGroupId);
-    if (sessionIt != m_sessions.end() && sessionIt->second->runtimeAgent()->enabled())
+    if (m_inspector->enabledRuntimeAgentForGroup(contextGroupId))
         stackSize = V8StackTraceImpl::maxCallStackSizeToCapture;
 
     return V8StackTraceImpl::capture(this, contextGroupId, stackSize);
 }
 
-v8::Local<v8::Context> V8InspectorImpl::regexContext()
-{
-    if (m_regexContext.IsEmpty())
-        m_regexContext.Reset(m_isolate, v8::Context::New(m_isolate));
-    return m_regexContext.Get(m_isolate);
-}
-
-void V8InspectorImpl::discardInspectedContext(int contextGroupId, int contextId)
-{
-    if (!getContext(contextGroupId, contextId))
-        return;
-    m_contexts[contextGroupId]->erase(contextId);
-    if (m_contexts[contextGroupId]->empty())
-        m_contexts.erase(contextGroupId);
-}
-
-const V8InspectorImpl::ContextByIdMap* V8InspectorImpl::contextGroup(int contextGroupId)
-{
-    ContextsByGroupMap::iterator iter = m_contexts.find(contextGroupId);
-    return iter == m_contexts.end() ? nullptr : iter->second.get();
-}
-
-V8InspectorSessionImpl* V8InspectorImpl::sessionForContextGroup(int contextGroupId)
-{
-    if (!contextGroupId)
-        return nullptr;
-    SessionMap::iterator iter = m_sessions.find(contextGroupId);
-    return iter == m_sessions.end() ? nullptr : iter->second;
-}
-
 } // namespace blink