Added Dartium changes onto 45.0.2454.104

Source/bindings/core/dart/DartInspectorDebuggerAgent.cpp

+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2014 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:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  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.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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.
+ */
+
+#include "config.h"
+#include "bindings/core/dart/DartInspectorDebuggerAgent.h"
+
+#include "bindings/common/ScriptValue.h"
+#include "bindings/core/dart/DartInjectedScriptManager.h"
+#include "bindings/core/dart/DartScriptDebugServer.h"
+#include "bindings/core/v8/ScriptDebugServer.h"
+#include "bindings/core/v8/ScriptRegexp.h"
+#include "bindings/core/v8/ScriptSourceCode.h"
+#include "core/dom/Document.h"
+#include "core/dom/ExecutionContextTask.h"
+#include "core/fetch/Resource.h"
+#include "core/inspector/ContentSearchUtils.h"
+#include "core/inspector/InspectorDebuggerAgent.h"
+#include "core/inspector/InspectorPageAgent.h"
+#include "core/inspector/InspectorState.h"
+#include "core/inspector/InstrumentingAgents.h"
+#include "core/inspector/JavaScriptCallFrame.h"
+#include "core/inspector/ScriptArguments.h"
+#include "core/inspector/ScriptCallFrame.h"
+#include "core/inspector/ScriptCallStack.h"
+#include "platform/JSONValues.h"
+#include "wtf/text/StringBuilder.h"
+#include "wtf/text/WTFString.h"
+
+using blink::TypeBuilder::Array;
+using blink::TypeBuilder::Debugger::BreakpointId;
+using blink::TypeBuilder::Debugger::CallFrame;
+using blink::TypeBuilder::Debugger::ExceptionDetails;
+using blink::TypeBuilder::Debugger::FunctionDetails;
+using blink::TypeBuilder::Debugger::ScriptId;
+using blink::TypeBuilder::Debugger::StackTrace;
+using blink::TypeBuilder::Runtime::RemoteObject;
+
+
+namespace blink {
+
+namespace DartDebuggerAgentState {
+static const char debuggerEnabled[] = "debuggerEnabledDart";
+static const char dartBreakpoints[] = "dartBreakpoints";
+static const char pauseOnExceptionsState[] = "dartPauseOnExceptionsState";
+static const char asyncCallStackDepth[] = "dartAsyncCallStackDepth";
+
+// Breakpoint properties.
+static const char url[] = "url";
+static const char isRegex[] = "isRegex";
+static const char lineNumber[] = "lineNumber";
+static const char columnNumber[] = "columnNumber";
+static const char condition[] = "condition";
+static const char isAnti[] = "isAnti";
+static const char skipStackPattern[] = "skipStackPattern";
+static const char skipAllPauses[] = "skipAllPauses";
+static const char skipAllPausesExpiresOnReload[] = "skipAllPausesExpiresOnReload";
+
+};
+
+static const int maxSkipStepInCountDart = 20;
+
+const char DartInspectorDebuggerAgent::backtraceObjectGroup[] = "backtrace";
+
+static String breakpointIdSuffixDart(DartInspectorDebuggerAgent::BreakpointSource source)
+{
+    switch (source) {
+    case DartInspectorDebuggerAgent::UserBreakpointSource:
+        break;
+    case DartInspectorDebuggerAgent::DebugCommandBreakpointSource:
+        return ":debug";
+    case DartInspectorDebuggerAgent::MonitorCommandBreakpointSource:
+        return ":monitor";
+    }
+    return String();
+}
+
+static String generateBreakpointIdDart(const String& scriptId, int lineNumber, int columnNumber, DartInspectorDebuggerAgent::BreakpointSource source)
+{
+    return scriptId + ':' + String::number(lineNumber) + ':' + String::number(columnNumber) + breakpointIdSuffixDart(source);
+}
+
+DartInspectorDebuggerAgent::DartInspectorDebuggerAgent(DartInjectedScriptManager* injectedScriptManager, InspectorDebuggerAgent* inspectorDebuggerAgent, InspectorPageAgent* pageAgent)
+    : m_injectedScriptManager(injectedScriptManager)
+    , m_frontend(0)
+    , m_pausedScriptState(nullptr)
+    , m_currentCallStack(0)
+    , m_javaScriptPauseScheduled(false)
+    , m_debuggerStepScheduled(false)
+    , m_steppingFromFramework(false)
+    , m_pausingOnNativeEvent(false)
+    , m_listener(nullptr)
+    , m_skippedStepInCount(0)
+    , m_skipAllPauses(false)
+    , m_inspectorDebuggerAgent(inspectorDebuggerAgent)
+    , m_pageAgent(pageAgent)
+{
+}
+
+DartInspectorDebuggerAgent::~DartInspectorDebuggerAgent()
+{
+}
+
+InspectorState* DartInspectorDebuggerAgent::state()
+{
+    return m_inspectorDebuggerAgent->m_state.get();
+}
+
+void DartInspectorDebuggerAgent::init()
+{
+    // FIXME: make breakReason optional so that there was no need to init it with "other".
+    clearBreakDetails();
+    state()->setLong(DartDebuggerAgentState::pauseOnExceptionsState, ScriptDebugServer::DontPauseOnExceptions);
+}
+
+void DartInspectorDebuggerAgent::enable()
+{
+    startListeningScriptDebugServer();
+    // FIXME(WK44513): breakpoints activated flag should be synchronized between all front-ends
+    scriptDebugServer().setBreakpointsActivated(true);
+
+    if (m_listener)
+        m_listener->debuggerWasEnabled();
+}
+
+void DartInspectorDebuggerAgent::disable()
+{
+    state()->setObject(DartDebuggerAgentState::dartBreakpoints, JSONObject::create());
+    state()->setLong(DartDebuggerAgentState::pauseOnExceptionsState, ScriptDebugServer::DontPauseOnExceptions);
+    state()->setString(DartDebuggerAgentState::skipStackPattern, "");
+    state()->setLong(DartDebuggerAgentState::asyncCallStackDepth, 0);
+
+    scriptDebugServer().clearBreakpoints();
+    stopListeningScriptDebugServer();
+    clear();
+
+    if (m_listener)
+        m_listener->debuggerWasDisabled();
+
+    m_skipAllPauses = false;
+}
+
+bool DartInspectorDebuggerAgent::enabled()
+{
+    return state()->getBoolean(DartDebuggerAgentState::debuggerEnabled);
+}
+
+void DartInspectorDebuggerAgent::enable(ErrorString*)
+{
+    if (enabled())
+        return;
+
+    enable();
+    state()->setBoolean(DartDebuggerAgentState::debuggerEnabled, true);
+
+    ASSERT(m_frontend);
+}
+
+void DartInspectorDebuggerAgent::disable(ErrorString*)
+{
+    if (!enabled())
+        return;
+
+    disable();
+    state()->setBoolean(DartDebuggerAgentState::debuggerEnabled, false);
+}
+
+static PassOwnPtr<ScriptRegexp> compileSkipCallFramePattern(String patternText)
+{
+    if (patternText.isEmpty())
+        return nullptr;
+    OwnPtr<ScriptRegexp> result = adoptPtr(new ScriptRegexp(patternText, TextCaseSensitive));
+    if (!result->isValid())
+        result.clear();
+    return result.release();
+}
+
+void DartInspectorDebuggerAgent::restore()
+{
+    if (enabled()) {
+        m_frontend->globalObjectCleared();
+        enable();
+        long pauseState = state()->getLong(DartDebuggerAgentState::pauseOnExceptionsState);
+        String error;
+        setPauseOnExceptionsImpl(&error, pauseState);
+        m_cachedSkipStackRegExp = compileSkipCallFramePattern(state()->getString(DartDebuggerAgentState::skipStackPattern));
+        m_skipAllPauses = state()->getBoolean(DartDebuggerAgentState::skipAllPauses);
+        if (m_skipAllPauses && state()->getBoolean(DartDebuggerAgentState::skipAllPausesExpiresOnReload)) {
+            m_skipAllPauses = false;
+            state()->setBoolean(DartDebuggerAgentState::skipAllPauses, false);
+        }
+    }
+}
+
+void DartInspectorDebuggerAgent::setFrontend(InspectorFrontend* frontend)
+{
+    m_frontend = frontend->debugger();
+}
+
+void DartInspectorDebuggerAgent::clearFrontend()
+{
+    m_frontend = 0;
+
+    if (!enabled())
+        return;
+
+    disable();
+
+    // FIXME: due to state()->mute() hack in InspectorController, debuggerEnabled is actually set to false only
+    // in InspectorState, but not in cookie. That's why after navigation debuggerEnabled will be true,
+    // but after front-end re-open it will still be false.
+    state()->setBoolean(DartDebuggerAgentState::debuggerEnabled, false);
+}
+
+void DartInspectorDebuggerAgent::setBreakpointsActive(ErrorString*, bool active)
+{
+    scriptDebugServer().setBreakpointsActivated(active);
+}
+
+void DartInspectorDebuggerAgent::setSkipAllPauses(ErrorString*, bool skipped, const bool* untilReload)
+{
+    m_skipAllPauses = skipped;
+    state()->setBoolean(DartDebuggerAgentState::skipAllPauses, m_skipAllPauses);
+    state()->setBoolean(DartDebuggerAgentState::skipAllPausesExpiresOnReload, asBool(untilReload));
+}
+
+void DartInspectorDebuggerAgent::pageDidCommitLoad()
+{
+    if (state()->getBoolean(DartDebuggerAgentState::skipAllPausesExpiresOnReload)) {
+        m_skipAllPauses = false;
+        state()->setBoolean(DartDebuggerAgentState::skipAllPauses, m_skipAllPauses);
+    }
+}
+
+bool DartInspectorDebuggerAgent::isPaused()
+{
+    return scriptDebugServer().isPaused();
+}
+
+bool DartInspectorDebuggerAgent::runningNestedMessageLoop()
+{
+    return scriptDebugServer().runningNestedMessageLoop();
+}
+
+static PassRefPtr<JSONObject> buildObjectForBreakpointCookie(const String& url, int lineNumber, int columnNumber, const String& condition, bool isRegex, bool isAnti)
+{
+    RefPtr<JSONObject> breakpointObject = JSONObject::create();
+    breakpointObject->setString(DartDebuggerAgentState::url, url);
+    breakpointObject->setNumber(DartDebuggerAgentState::lineNumber, lineNumber);
+    breakpointObject->setNumber(DartDebuggerAgentState::columnNumber, columnNumber);
+    breakpointObject->setString(DartDebuggerAgentState::condition, condition);
+    breakpointObject->setBoolean(DartDebuggerAgentState::isRegex, isRegex);
+    breakpointObject->setBoolean(DartDebuggerAgentState::isAnti, isAnti);
+    return breakpointObject;
+}
+
+static String scriptSourceURL(const DartScriptDebugListener::Script& script)
+{
+    bool hasSourceURL = !script.sourceURL.isEmpty();
+    return hasSourceURL ? script.sourceURL : script.url;
+}
+
+static bool matches(const String& url, const String& pattern, bool isRegex)
+{
+    if (isRegex) {
+        ScriptRegexp regex(pattern, TextCaseSensitive);
+        return regex.match(url) != -1;
+    }
+    return url == pattern;
+}
+
+void DartInspectorDebuggerAgent::setBreakpointByUrl(ErrorString* errorString, int lineNumber, const String* const optionalURL, const String* const optionalURLRegex, const int* const optionalColumnNumber, const String* const optionalCondition, const bool* isAntiBreakpoint, BreakpointId* outBreakpointId, RefPtr<Array<TypeBuilder::Debugger::Location> >& locations)
+{
+    locations = Array<TypeBuilder::Debugger::Location>::create();
+    if (!optionalURL == !optionalURLRegex) {
+        *errorString = "Either url or urlRegex must be specified.";
+        return;
+    }
+
+    bool isAntiBreakpointValue = asBool(isAntiBreakpoint);
+
+    String url = optionalURL ? *optionalURL : *optionalURLRegex;
+    int columnNumber;
+    if (optionalColumnNumber) {
+        columnNumber = *optionalColumnNumber;
+        if (columnNumber < 0) {
+            *errorString = "Incorrect column number";
+            return;
+        }
+    } else {
+        columnNumber = isAntiBreakpointValue ? -1 : 0;
+    }
+    String condition = optionalCondition ? *optionalCondition : "";
+    bool isRegex = optionalURLRegex;
+
+    String breakpointId = (isRegex ? "/" + url + "/" : url) + ':' + String::number(lineNumber) + ':' + String::number(columnNumber);
+    RefPtr<JSONObject> breakpointsCookie = state()->getObject(DartDebuggerAgentState::dartBreakpoints);
+    if (breakpointsCookie->find(breakpointId) != breakpointsCookie->end()) {
+        *errorString = "Breakpoint at specified location already exists.";
+        return;
+    }
+
+    breakpointsCookie->setObject(breakpointId, buildObjectForBreakpointCookie(url, lineNumber, columnNumber, condition, isRegex, isAntiBreakpointValue));
+    state()->setObject(DartDebuggerAgentState::dartBreakpoints, breakpointsCookie);
+
+    if (!isAntiBreakpointValue) {
+        ScriptBreakpoint breakpoint(lineNumber, columnNumber, condition);
+        for (ScriptsMap::iterator it = m_scripts.begin(); it != m_scripts.end(); ++it) {
+            if (!matches(scriptSourceURL(it->value), url, isRegex))
+                continue;
+            RefPtr<TypeBuilder::Debugger::Location> location = resolveBreakpoint(breakpointId, it->key, breakpoint, UserBreakpointSource);
+            if (location)
+                locations->addItem(location);
+        }
+    }
+    *outBreakpointId = breakpointId;
+}
+
+static bool parseLocation(ErrorString* errorString, PassRefPtr<JSONObject> location, String* scriptId, int* lineNumber, int* columnNumber)
+{
+    if (!location->getString("scriptId", scriptId) || !location->getNumber("lineNumber", lineNumber)) {
+        // FIXME: replace with input validation.
+        *errorString = "scriptId and lineNumber are required.";
+        return false;
+    }
+    *columnNumber = 0;
+    location->getNumber("columnNumber", columnNumber);
+    return true;
+}
+
+void DartInspectorDebuggerAgent::setBreakpoint(ErrorString* errorString, const RefPtr<JSONObject>& location, const String* const optionalCondition, BreakpointId* outBreakpointId, RefPtr<TypeBuilder::Debugger::Location>& actualLocation)
+{
+    String scriptId;
+    int lineNumber;
+    int columnNumber;
+
+    if (!parseLocation(errorString, location, &scriptId, &lineNumber, &columnNumber))
+        return;
+
+    String condition = optionalCondition ? *optionalCondition : emptyString();
+
+    String breakpointId = generateBreakpointIdDart(scriptId, lineNumber, columnNumber, UserBreakpointSource);
+    if (m_breakpointIdToDebugServerBreakpointIds.find(breakpointId) != m_breakpointIdToDebugServerBreakpointIds.end()) {
+        *errorString = "Breakpoint at specified location already exists.";
+        return;
+    }
+    ScriptBreakpoint breakpoint(lineNumber, columnNumber, condition);
+    actualLocation = resolveBreakpoint(breakpointId, scriptId, breakpoint, UserBreakpointSource);
+    if (actualLocation)
+        *outBreakpointId = breakpointId;
+    else
+        *errorString = "Could not resolve breakpoint";
+}
+
+void DartInspectorDebuggerAgent::removeBreakpoint(ErrorString*, const String& breakpointId)
+{
+    RefPtr<JSONObject> breakpointsCookie = state()->getObject(DartDebuggerAgentState::dartBreakpoints);
+    JSONObject::iterator it = breakpointsCookie->find(breakpointId);
+    bool isAntibreakpoint = false;
+    if (it != breakpointsCookie->end()) {
+        RefPtr<JSONObject> breakpointObject = it->value->asObject();
+        breakpointObject->getBoolean(DartDebuggerAgentState::isAnti, &isAntibreakpoint);
+        breakpointsCookie->remove(breakpointId);
+        state()->setObject(DartDebuggerAgentState::dartBreakpoints, breakpointsCookie);
+    }
+
+    if (!isAntibreakpoint)
+        removeBreakpoint(breakpointId);
+}
+
+void DartInspectorDebuggerAgent::removeBreakpoint(const String& breakpointId)
+{
+    BreakpointIdToDebugServerBreakpointIdsMap::iterator debugServerBreakpointIdsIterator = m_breakpointIdToDebugServerBreakpointIds.find(breakpointId);
+    if (debugServerBreakpointIdsIterator == m_breakpointIdToDebugServerBreakpointIds.end())
+        return;
+    for (size_t i = 0; i < debugServerBreakpointIdsIterator->value.size(); ++i) {
+        const String& debugServerBreakpointId = debugServerBreakpointIdsIterator->value[i];
+        scriptDebugServer().removeBreakpoint(debugServerBreakpointId);
+        m_serverBreakpoints.remove(debugServerBreakpointId);
+    }
+    m_breakpointIdToDebugServerBreakpointIds.remove(debugServerBreakpointIdsIterator);
+}
+
+void DartInspectorDebuggerAgent::continueToLocation(ErrorString* errorString, const RefPtr<JSONObject>& location, const bool* interstateLocationOpt)
+{
+    if (!m_continueToLocationBreakpointId.isEmpty()) {
+        scriptDebugServer().removeBreakpoint(m_continueToLocationBreakpointId);
+        m_continueToLocationBreakpointId = "";
+    }
+
+    String scriptId;
+    int lineNumber;
+    int columnNumber;
+
+    if (!parseLocation(errorString, location, &scriptId, &lineNumber, &columnNumber))
+        return;
+
+    ScriptBreakpoint breakpoint(lineNumber, columnNumber, "");
+    m_continueToLocationBreakpointId = scriptDebugServer().setBreakpoint(scriptId, breakpoint, &lineNumber, &columnNumber, asBool(interstateLocationOpt));
+    resume(errorString);
+}
+
+void DartInspectorDebuggerAgent::getBacktrace(ErrorString* errorString, RefPtr<Array<CallFrame> >& callFrames, WTF::RefPtr<blink::TypeBuilder::Debugger::StackTrace>& asyncStackTrace)
+{
+    if (!assertPaused(errorString))
+        return;
+    m_currentCallStack = scriptDebugServer().currentCallFrames();
+    callFrames = currentCallFrames();
+}
+
+ScriptCallFrame DartInspectorDebuggerAgent::topCallFrameSkipUnknownSources()
+{
+    for (int index = 0; ; ++index) {
+        ScriptCallFrame frame = scriptDebugServer().callFrameNoScopes(index);
+        if (frame.isEmpty())
+            return ScriptCallFrame();
+        // FIXMEDART: is this the correct scriptId?
+        if (m_scripts.contains(frame.scriptId()))
+            return frame;
+    }
+}
+
+DartScriptDebugListener::SkipPauseRequest DartInspectorDebuggerAgent::shouldSkipExceptionPause()
+{
+    if (m_steppingFromFramework)
+        return DartScriptDebugListener::NoSkip;
+
+    // FIXME: Fast return: if (!m_cachedSkipStackRegExp && !has_any_anti_breakpoint) return DartScriptDebugListener::NoSkip;
+
+    const ScriptCallFrame& topFrame = topCallFrameSkipUnknownSources();
+    if (topFrame.isEmpty())
+        return DartScriptDebugListener::NoSkip;
+
+    String topFrameScriptUrl = topFrame.sourceURL();
+    if (m_cachedSkipStackRegExp && !topFrameScriptUrl.isEmpty() && m_cachedSkipStackRegExp->match(topFrameScriptUrl) != -1)
+        return DartScriptDebugListener::Continue;
+
+    // Match against breakpoints.
+    if (topFrameScriptUrl.isEmpty())
+        return DartScriptDebugListener::NoSkip;
+
+    // Prepare top frame parameters.
+    int topFrameLineNumber = topFrame.lineNumber();
+    int topFrameColumnNumber = topFrame.columnNumber();
+
+    RefPtr<JSONObject> breakpointsCookie = state()->getObject(DartDebuggerAgentState::dartBreakpoints);
+    for (JSONObject::iterator it = breakpointsCookie->begin(); it != breakpointsCookie->end(); ++it) {
+        RefPtr<JSONObject> breakpointObject = it->value->asObject();
+        bool isAntibreakpoint;
+        breakpointObject->getBoolean(DartDebuggerAgentState::isAnti, &isAntibreakpoint);
+        if (!isAntibreakpoint)
+            continue;
+
+        int breakLineNumber;
+        breakpointObject->getNumber(DartDebuggerAgentState::lineNumber, &breakLineNumber);
+        int breakColumnNumber;
+        breakpointObject->getNumber(DartDebuggerAgentState::columnNumber, &breakColumnNumber);
+
+        if (breakLineNumber != topFrameLineNumber)
+            continue;
+
+        if (breakColumnNumber != -1 && breakColumnNumber != topFrameColumnNumber)
+            continue;
+
+        bool isRegex;
+        breakpointObject->getBoolean(DartDebuggerAgentState::isRegex, &isRegex);
+        String url;
+        breakpointObject->getString(DartDebuggerAgentState::url, &url);
+        if (!matches(topFrameScriptUrl, url, isRegex))
+            continue;
+
+        return DartScriptDebugListener::Continue;
+    }
+
+    return DartScriptDebugListener::NoSkip;
+}
+
+DartScriptDebugListener::SkipPauseRequest DartInspectorDebuggerAgent::shouldSkipStepPause()
+{
+    if (!m_cachedSkipStackRegExp || m_steppingFromFramework)
+        return DartScriptDebugListener::NoSkip;
+
+    ScriptCallFrame topFrame = topCallFrameSkipUnknownSources();
+    String scriptUrl = topFrame.sourceURL();
+    if (scriptUrl.isEmpty() || m_cachedSkipStackRegExp->match(scriptUrl) == -1)
+        return DartScriptDebugListener::NoSkip;
+
+    if (m_skippedStepInCount == 0) {
+        m_minFrameCountForSkip = scriptDebugServer().frameCount();
+        m_skippedStepInCount = 1;
+        return DartScriptDebugListener::StepInto;
+    }
+
+    if (m_skippedStepInCount < maxSkipStepInCountDart && scriptDebugServer().frameCount() <= m_minFrameCountForSkip)
+        m_skippedStepInCount = maxSkipStepInCountDart;
+
+    if (m_skippedStepInCount >= maxSkipStepInCountDart) {
+        if (m_pausingOnNativeEvent) {
+            m_pausingOnNativeEvent = false;
+            m_skippedStepInCount = 0;
+            return DartScriptDebugListener::Continue;
+        }
+        return DartScriptDebugListener::StepOut;
+    }
+
+    ++m_skippedStepInCount;
+    return DartScriptDebugListener::StepInto;
+}
+
+bool DartInspectorDebuggerAgent::isTopCallFrameInFramework()
+{
+    if (!m_cachedSkipStackRegExp)
+        return false;
+
+    ScriptCallFrame topFrame = topCallFrameSkipUnknownSources();
+    if (topFrame.isEmpty())
+        return false;
+
+    String scriptUrl = topFrame.sourceURL();
+    return !scriptUrl.isEmpty() && m_cachedSkipStackRegExp->match(scriptUrl) != -1;
+}
+
+bool DartInspectorDebuggerAgent::isDartScriptId(const String& scriptId)
+{
+    ScriptsMap::iterator scriptIterator = m_scripts.find(scriptId);
+    return scriptIterator != m_scripts.end();
+}
+
+bool DartInspectorDebuggerAgent::isDartURL(const String* const optionalURL, const String* const optionalURLRegex)
+{
+    return (optionalURL && (optionalURL->endsWith(".dart", false) || optionalURL->startsWith("dart:"))) || (optionalURLRegex && (optionalURLRegex->endsWith(".dart", false) || optionalURLRegex->startsWith("dart:")));
+}
+
+PassRefPtr<TypeBuilder::Debugger::Location> DartInspectorDebuggerAgent::resolveBreakpoint(const String& breakpointId, const String& scriptId, const ScriptBreakpoint& breakpoint, BreakpointSource source)
+{
+    ScriptsMap::iterator scriptIterator = m_scripts.find(scriptId);
+    if (scriptIterator == m_scripts.end())
+        return nullptr;
+    Script& script = scriptIterator->value;
+    if (breakpoint.lineNumber < script.startLine || script.endLine < breakpoint.lineNumber)
+        return nullptr;
+
+    int actualLineNumber;
+    int actualColumnNumber;
+    String debugServerBreakpointId = scriptDebugServer().setBreakpoint(scriptId, breakpoint, &actualLineNumber, &actualColumnNumber, false);
+    if (debugServerBreakpointId.isEmpty())
+        return nullptr;
+
+    m_serverBreakpoints.set(debugServerBreakpointId, std::make_pair(breakpointId, source));
+
+    BreakpointIdToDebugServerBreakpointIdsMap::iterator debugServerBreakpointIdsIterator = m_breakpointIdToDebugServerBreakpointIds.find(breakpointId);
+    if (debugServerBreakpointIdsIterator == m_breakpointIdToDebugServerBreakpointIds.end())
+        m_breakpointIdToDebugServerBreakpointIds.set(breakpointId, Vector<String>()).storedValue->value.append(debugServerBreakpointId);
+    else
+        debugServerBreakpointIdsIterator->value.append(debugServerBreakpointId);
+
+    RefPtr<TypeBuilder::Debugger::Location> location = TypeBuilder::Debugger::Location::create()
+        .setScriptId(scriptId)
+        .setLineNumber(actualLineNumber);
+    location->setColumnNumber(actualColumnNumber);
+    return location;
+}
+
+void DartInspectorDebuggerAgent::searchInContent(ErrorString* error, const String& scriptId, const String& query, const bool* const optionalCaseSensitive, const bool* const optionalIsRegex, RefPtr<Array<blink::TypeBuilder::Page::SearchMatch> >& results)
+{
+    ScriptsMap::iterator it = m_scripts.find(scriptId);
+    if (it != m_scripts.end())
+        results = ContentSearchUtils::searchInTextByLines(it->value.source, query, asBool(optionalCaseSensitive), asBool(optionalIsRegex));
+    else
+        *error = "No script for id: " + scriptId;
+}
+
+void DartInspectorDebuggerAgent::getScriptSource(ErrorString* error, const String& scriptId, String* scriptSource)
+{
+    ScriptsMap::iterator it = m_scripts.find(scriptId);
+    if (it == m_scripts.end()) {
+        *error = "No script for id: " + scriptId;
+        return;
+    }
+
+    String url = it->value.url;
+    if (!url.isEmpty()) {
+        if (m_pageAgent) {
+            bool success = m_pageAgent->getEditedResourceContent(url, scriptSource);
+            if (success)
+                return;
+        }
+    }
+    *scriptSource = it->value.source;
+}
+
+void DartInspectorDebuggerAgent::getFunctionDetails(ErrorString* errorString, const String& functionId, RefPtr<FunctionDetails>& details)
+{
+    DartInjectedScript* injectedScript = m_injectedScriptManager->injectedScriptForObjectId(functionId);
+    if (!injectedScript) {
+        *errorString = "Function object id is obsolete";
+        return;
+    }
+    injectedScript->getFunctionDetails(errorString, functionId, &details);
+}
+
+void DartInspectorDebuggerAgent::schedulePauseOnNextStatement(InspectorFrontend::Debugger::Reason::Enum breakReason, PassRefPtr<JSONObject> data)
+{
+    if (m_javaScriptPauseScheduled || isPaused())
+        return;
+    m_breakReason = breakReason;
+    m_breakAuxData = data;
+    m_pausingOnNativeEvent = true;
+    scriptDebugServer().setPauseOnNextStatement(true);
+}
+
+void DartInspectorDebuggerAgent::cancelPauseOnNextStatement()
+{
+    if (m_javaScriptPauseScheduled || isPaused())
+        return;
+    clearBreakDetails();
+    m_pausingOnNativeEvent = false;
+    scriptDebugServer().setPauseOnNextStatement(false);
+}
+
+void DartInspectorDebuggerAgent::pause(ErrorString*)
+{
+    if (m_javaScriptPauseScheduled || isPaused())
+        return;
+    clearBreakDetails();
+    m_javaScriptPauseScheduled = true;
+    scriptDebugServer().setPauseOnNextStatement(true);
+}
+
+void DartInspectorDebuggerAgent::resume(ErrorString* errorString)
+{
+    if (!assertPaused(errorString))
+        return;
+    m_debuggerStepScheduled = false;
+    m_steppingFromFramework = false;
+    m_injectedScriptManager->releaseObjectGroup(DartInspectorDebuggerAgent::backtraceObjectGroup);
+    scriptDebugServer().continueProgram();
+}
+
+void DartInspectorDebuggerAgent::stepOver(ErrorString* errorString)
+{
+    if (!assertPaused(errorString))
+        return;
+    m_debuggerStepScheduled = true;
+    m_steppingFromFramework = isTopCallFrameInFramework();
+    m_injectedScriptManager->releaseObjectGroup(DartInspectorDebuggerAgent::backtraceObjectGroup);
+    scriptDebugServer().stepOverStatement();
+}
+
+void DartInspectorDebuggerAgent::stepInto(ErrorString* errorString)
+{
+    if (!assertPaused(errorString))
+        return;
+    m_debuggerStepScheduled = true;
+    m_steppingFromFramework = isTopCallFrameInFramework();
+    m_injectedScriptManager->releaseObjectGroup(DartInspectorDebuggerAgent::backtraceObjectGroup);
+    scriptDebugServer().stepIntoStatement();
+    if (m_listener)
+        m_listener->stepInto();
+}
+
+void DartInspectorDebuggerAgent::stepOut(ErrorString* errorString)
+{
+    if (!assertPaused(errorString))
+        return;
+    m_debuggerStepScheduled = true;
+    m_steppingFromFramework = isTopCallFrameInFramework();
+    m_injectedScriptManager->releaseObjectGroup(DartInspectorDebuggerAgent::backtraceObjectGroup);
+    scriptDebugServer().stepOutOfFunction();
+}
+
+void DartInspectorDebuggerAgent::setPauseOnExceptions(ErrorString* errorString, const String& stringPauseState)
+{
+    ScriptDebugServer::PauseOnExceptionsState pauseState;
+    if (stringPauseState == "none") {
+        pauseState = ScriptDebugServer::DontPauseOnExceptions;
+    } else if (stringPauseState == "all") {
+        pauseState = ScriptDebugServer::PauseOnAllExceptions;
+    } else if (stringPauseState == "uncaught") {
+        pauseState = ScriptDebugServer::PauseOnUncaughtExceptions;
+    } else {
+        *errorString = "Unknown pause on exceptions mode: " + stringPauseState;
+        return;
+    }
+    setPauseOnExceptionsImpl(errorString, pauseState);
+}
+
+void DartInspectorDebuggerAgent::setPauseOnExceptionsImpl(ErrorString* errorString, int pauseState)
+{
+    scriptDebugServer().setPauseOnExceptionsState(static_cast<ScriptDebugServer::PauseOnExceptionsState>(pauseState));
+    if (scriptDebugServer().pauseOnExceptionsState() != pauseState)
+        *errorString = "Internal error. Could not change pause on exceptions state";
+    else
+        state()->setLong(DartDebuggerAgentState::pauseOnExceptionsState, pauseState);
+}
+
+void DartInspectorDebuggerAgent::evaluateOnCallFrame(ErrorString* errorString, const String& callFrameId, const String& expression, const String* const objectGroup, const bool* const includeCommandLineAPI, const bool* const doNotPauseOnExceptionsAndMuteConsole, const bool* const returnByValue, const bool* generatePreview, RefPtr<RemoteObject>& result, TypeBuilder::OptOutput<bool>* wasThrown, RefPtr<TypeBuilder::Debugger::ExceptionDetails>& exceptionDetails)
+{
+    if (!isPaused() || !m_currentCallStack) {
+        *errorString = "Attempt to access callframe when debugger is not on pause";
+        return;
+    }
+    DartInjectedScript* injectedScript = m_injectedScriptManager->injectedScriptForObjectId(callFrameId);
+    if (!injectedScript) {
+        *errorString = "Inspected frame has gone";
+        return;
+    }
+
+    ScriptDebugServer::PauseOnExceptionsState previousPauseOnExceptionsState = scriptDebugServer().pauseOnExceptionsState();
+    if (asBool(doNotPauseOnExceptionsAndMuteConsole)) {
+        if (previousPauseOnExceptionsState != ScriptDebugServer::DontPauseOnExceptions)
+            scriptDebugServer().setPauseOnExceptionsState(ScriptDebugServer::DontPauseOnExceptions);
+        muteConsole();
+    }
+
+    injectedScript->evaluateOnCallFrame(errorString, m_currentCallStack, callFrameId, expression, objectGroup ? *objectGroup : "", asBool(includeCommandLineAPI), asBool(returnByValue), asBool(generatePreview), &result, wasThrown, &exceptionDetails);
+    // V8 doesn't generate afterCompile event when it's in debugger therefore there is no content of evaluated scripts on frontend
+    // therefore contents of the stack does not provide necessary information
+    if (exceptionDetails)
+        exceptionDetails->setStackTrace(TypeBuilder::Array<TypeBuilder::Console::CallFrame>::create());
+    if (asBool(doNotPauseOnExceptionsAndMuteConsole)) {
+        unmuteConsole();
+        if (scriptDebugServer().pauseOnExceptionsState() != previousPauseOnExceptionsState)
+            scriptDebugServer().setPauseOnExceptionsState(previousPauseOnExceptionsState);
+    }
+}
+
+void DartInspectorDebuggerAgent::getCompletionsOnCallFrame(ErrorString* errorString, const String& callFrameId, const String& expression, RefPtr<TypeBuilder::Array<String> >& result)
+{
+    if (!isPaused() || !m_currentCallStack) {
+        *errorString = "Attempt to access callframe when debugger is not on pause";
+        return;
+    }
+    DartInjectedScript* injectedScript = m_injectedScriptManager->injectedScriptForObjectId(callFrameId);
+    if (!injectedScript) {
+        *errorString = "Inspected frame has gone";
+        return;
+    }
+
+    ScriptDebugServer::PauseOnExceptionsState previousPauseOnExceptionsState = scriptDebugServer().pauseOnExceptionsState();
+    if (previousPauseOnExceptionsState != ScriptDebugServer::DontPauseOnExceptions)
+        scriptDebugServer().setPauseOnExceptionsState(ScriptDebugServer::DontPauseOnExceptions);
+    muteConsole();
+
+    injectedScript->getCompletionsOnCallFrame(errorString, m_currentCallStack, callFrameId, expression, &result);
+
+    unmuteConsole();
+    if (scriptDebugServer().pauseOnExceptionsState() != previousPauseOnExceptionsState)
+        scriptDebugServer().setPauseOnExceptionsState(previousPauseOnExceptionsState);
+}
+
+void DartInspectorDebuggerAgent::setOverlayMessage(ErrorString*, const String*)
+{
+}
+
+void DartInspectorDebuggerAgent::setVariableValue(ErrorString* errorString, int scopeNumber, const String& variableName, const RefPtr<JSONObject>& newValue, const String* callFrameId, const String* functionObjectId)
+{
+    DartInjectedScript* injectedScript = 0;
+    if (callFrameId) {
+        if (!isPaused() || !m_currentCallStack) {
+            *errorString = "Attempt to access callframe when debugger is not on pause";
+            return;
+        }
+        injectedScript = m_injectedScriptManager->injectedScriptForObjectId(*callFrameId);
+        if (injectedScript->isEmpty()) {
+            *errorString = "Inspected frame has gone";
+            return;
+        }
+    } else if (functionObjectId) {
+        injectedScript = m_injectedScriptManager->injectedScriptForObjectId(*functionObjectId);
+        if (injectedScript->isEmpty()) {
+            *errorString = "Function object id cannot be resolved";
+            return;
+        }
+    } else {
+        *errorString = "Either call frame or function object must be specified";
+        return;
+    }
+    String newValueString = newValue->toJSONString();
+    ASSERT(injectedScript);
+    injectedScript->setVariableValue(errorString, m_currentCallStack, callFrameId, functionObjectId, scopeNumber, variableName, newValueString);
+}
+
+void DartInspectorDebuggerAgent::skipStackFrames(ErrorString* errorString, const String* pattern)
+{
+    OwnPtr<ScriptRegexp> compiled;
+    String patternValue = pattern ? *pattern : "";
+    if (!patternValue.isEmpty()) {
+        compiled = compileSkipCallFramePattern(patternValue);
+        if (!compiled) {
+            *errorString = "Invalid regular expression";
+            return;
+        }
+    }
+    state()->setString(DartDebuggerAgentState::skipStackPattern, patternValue);
+    m_cachedSkipStackRegExp = compiled.release();
+}
+
+void DartInspectorDebuggerAgent::scriptExecutionBlockedByCSP(const String& directiveText)
+{
+    if (scriptDebugServer().pauseOnExceptionsState() != ScriptDebugServer::DontPauseOnExceptions) {
+        RefPtr<JSONObject> directive = JSONObject::create();
+        directive->setString("directiveText", directiveText);
+        breakProgram(InspectorFrontend::Debugger::Reason::CSPViolation, directive.release());
+    }
+}
+
+PassRefPtr<Array<CallFrame> > DartInspectorDebuggerAgent::currentCallFrames()
+{
+    if (!m_pausedScriptState || !m_currentCallStack)
+        return Array<TypeBuilder::Debugger::CallFrame>::create();
+    DartInjectedScript* injectedScript = m_injectedScriptManager->injectedScriptFor(m_pausedScriptState.get());
+    if (!injectedScript) {
+        ASSERT_NOT_REACHED();
+        return Array<CallFrame>::create();
+    }
+    return injectedScript->wrapCallFrames(m_currentCallStack, 0);
+}
+
+String DartInspectorDebuggerAgent::sourceMapURLForScript(const Script& script, CompileResult compileResult)
+{
+    bool hasSyntaxError = compileResult != CompileSuccess;
+    if (hasSyntaxError) {
+        bool deprecated;
+        String sourceMapURL = ContentSearchUtils::findSourceMapURL(script.source, ContentSearchUtils::JavaScriptMagicComment, &deprecated);
+        if (!sourceMapURL.isEmpty())
+            return sourceMapURL;
+    }
+
+    if (!script.sourceMappingURL.isEmpty())
+        return script.sourceMappingURL;
+
+    if (script.url.isEmpty())
+        return String();
+
+    if (!m_pageAgent)
+        return String();
+    return m_pageAgent->resourceSourceMapURL(script.url);
+}
+
+// DartScriptDebugListener functions
+
+void DartInspectorDebuggerAgent::didParseSource(const String& scriptId, const Script& parsedScript, CompileResult compileResult)
+{
+    Script script = parsedScript;
+    const bool* isContentScript = script.isContentScript ? &script.isContentScript : 0;
+
+    const String* languageParam = script.language.isNull() ? 0 : &(script.language);
+    const int* libraryIdParam = script.libraryId < 0 ? 0 : &(script.libraryId);
+    bool hasSyntaxError = compileResult != CompileSuccess;
+    if (!script.startLine && !script.startColumn) {
+        if (hasSyntaxError) {
+            bool deprecated;
+            script.sourceURL = ContentSearchUtils::findSourceURL(script.source, ContentSearchUtils::JavaScriptMagicComment, &deprecated);
+        }
+    } else {
+        script.sourceURL = String();
+    }
+
+    bool hasSourceURL = !script.sourceURL.isEmpty();
+    String scriptURL = hasSourceURL ? script.sourceURL : script.url;
+
+    String sourceMapURL = sourceMapURLForScript(script, compileResult);
+    String* sourceMapURLParam = sourceMapURL.isNull() ? 0 : &sourceMapURL;
+
+    bool* hasSourceURLParam = hasSourceURL ? &hasSourceURL : 0;
+    if (!hasSyntaxError)
+        m_frontend->scriptParsed(scriptId, scriptURL, script.startLine, script.startColumn, script.endLine, script.endColumn, isContentScript, sourceMapURLParam, hasSourceURLParam, languageParam, libraryIdParam);
+    else
+        m_frontend->scriptFailedToParse(scriptId, scriptURL, script.startLine, script.startColumn, script.endLine, script.endColumn, isContentScript, sourceMapURLParam, hasSourceURLParam, languageParam, libraryIdParam);
+
+    m_scripts.set(scriptId, script);
+
+    if (scriptURL.isEmpty() || hasSyntaxError)
+        return;
+
+    RefPtr<JSONObject> breakpointsCookie = state()->getObject(DartDebuggerAgentState::dartBreakpoints);
+    for (JSONObject::iterator it = breakpointsCookie->begin(); it != breakpointsCookie->end(); ++it) {
+        RefPtr<JSONObject> breakpointObject = it->value->asObject();
+        bool isAntibreakpoint;
+        breakpointObject->getBoolean(DartDebuggerAgentState::isAnti, &isAntibreakpoint);
+        if (isAntibreakpoint)
+            continue;
+        bool isRegex;
+        breakpointObject->getBoolean(DartDebuggerAgentState::isRegex, &isRegex);
+        String url;
+        breakpointObject->getString(DartDebuggerAgentState::url, &url);
+        if (!matches(scriptURL, url, isRegex))
+            continue;
+        ScriptBreakpoint breakpoint;
+        breakpointObject->getNumber(DartDebuggerAgentState::lineNumber, &breakpoint.lineNumber);
+        breakpointObject->getNumber(DartDebuggerAgentState::columnNumber, &breakpoint.columnNumber);
+        breakpointObject->getString(DartDebuggerAgentState::condition, &breakpoint.condition);
+        RefPtr<TypeBuilder::Debugger::Location> location = resolveBreakpoint(it->key, scriptId, breakpoint, UserBreakpointSource);
+        if (location)
+            m_frontend->breakpointResolved(it->key, location);
+    }
+}
+
+DartScriptDebugListener::SkipPauseRequest DartInspectorDebuggerAgent::didPause(ScriptState* scriptState, Dart_StackTrace callFrames, const ScriptValue& exception, const Vector<String>& hitBreakpoints)
+{
+    DartScriptDebugListener::SkipPauseRequest result;
+    if (!callFrames)
+        result = DartScriptDebugListener::Continue; // Skip pauses inside V8 internal scripts and on syntax errors.
+    else if (m_javaScriptPauseScheduled)
+        result = DartScriptDebugListener::NoSkip; // Don't skip explicit pause requests from front-end.
+    else if (m_skipAllPauses)
+        result = DartScriptDebugListener::Continue;
+    else if (!hitBreakpoints.isEmpty())
+        result = DartScriptDebugListener::NoSkip; // Don't skip explicit breakpoints even if set in frameworks.
+    else if (!exception.isEmpty())
+        result = shouldSkipExceptionPause();
+    else if (m_debuggerStepScheduled || m_pausingOnNativeEvent)
+        result = shouldSkipStepPause();
+    else
+        result = DartScriptDebugListener::NoSkip;
+
+    if (result != DartScriptDebugListener::NoSkip)
+        return result;
+
+    ASSERT(scriptState && !m_pausedScriptState);
+    m_pausedScriptState = scriptState;
+    m_currentCallStack = callFrames;
+
+    if (!exception.isEmpty()) {
+        DartInjectedScript* injectedScript = m_injectedScriptManager->injectedScriptFor(scriptState);
+        if (injectedScript) {
+            m_breakReason = InspectorFrontend::Debugger::Reason::Exception;
+            m_breakAuxData = injectedScript->wrapObject(exception, DartInspectorDebuggerAgent::backtraceObjectGroup)->openAccessors();
+            // m_breakAuxData might be null after this.
+        }
+    }
+
+    RefPtr<Array<String> > hitBreakpointIds = Array<String>::create();
+
+    for (Vector<String>::const_iterator i = hitBreakpoints.begin(); i != hitBreakpoints.end(); ++i) {
+        DebugServerBreakpointToBreakpointIdAndSourceMap::iterator breakpointIterator = m_serverBreakpoints.find(*i);
+        if (breakpointIterator != m_serverBreakpoints.end()) {
+            const String& localId = breakpointIterator->value.first;
+            hitBreakpointIds->addItem(localId);
+
+            BreakpointSource source = breakpointIterator->value.second;
+            if (m_breakReason == InspectorFrontend::Debugger::Reason::Other && source == DebugCommandBreakpointSource)
+                m_breakReason = InspectorFrontend::Debugger::Reason::DebugCommand;
+        }
+    }
+
+    m_frontend->paused(currentCallFrames(), m_breakReason, m_breakAuxData, hitBreakpointIds, nullptr);
+    m_javaScriptPauseScheduled = false;
+    m_debuggerStepScheduled = false;
+    m_steppingFromFramework = false;
+    m_pausingOnNativeEvent = false;
+    m_skippedStepInCount = 0;
+
+    if (!m_continueToLocationBreakpointId.isEmpty()) {
+        scriptDebugServer().removeBreakpoint(m_continueToLocationBreakpointId);
+        m_continueToLocationBreakpointId = "";
+    }
+    if (m_listener)
+        m_listener->didPause();
+    return result;
+}
+
+void DartInspectorDebuggerAgent::didContinue()
+{
+    m_pausedScriptState = nullptr;
+    m_currentCallStack = 0;
+    clearBreakDetails();
+    // Already called by InspectorDebuggerAgent?
+    m_frontend->resumed();
+}
+
+bool DartInspectorDebuggerAgent::canBreakProgram()
+{
+    return scriptDebugServer().canBreakProgram();
+}
+
+void DartInspectorDebuggerAgent::breakProgram(InspectorFrontend::Debugger::Reason::Enum breakReason, PassRefPtr<JSONObject> data)
+{
+    if (m_skipAllPauses)
+        return;
+    m_breakReason = breakReason;
+    m_breakAuxData = data;
+    m_debuggerStepScheduled = false;
+    m_steppingFromFramework = false;
+    m_pausingOnNativeEvent = false;
+    scriptDebugServer().breakProgram();
+}
+
+void DartInspectorDebuggerAgent::clear()
+{
+    m_pausedScriptState = nullptr;
+    m_currentCallStack = 0;
+    m_scripts.clear();
+    m_breakpointIdToDebugServerBreakpointIds.clear();
+    m_continueToLocationBreakpointId = String();
+    clearBreakDetails();
+    m_javaScriptPauseScheduled = false;
+    m_debuggerStepScheduled = false;
+    m_steppingFromFramework = false;
+    m_pausingOnNativeEvent = false;
+    ErrorString error;
+    setOverlayMessage(&error, 0);
+}
+
+bool DartInspectorDebuggerAgent::assertPaused(ErrorString* errorString)
+{
+    if (!m_pausedScriptState) {
+        *errorString = "Can only perform operation while paused.";
+        return false;
+    }
+    return true;
+}
+
+void DartInspectorDebuggerAgent::clearBreakDetails()
+{
+    m_breakReason = InspectorFrontend::Debugger::Reason::Other;
+    m_breakAuxData = nullptr;
+}
+
+void DartInspectorDebuggerAgent::setBreakpoint(const String& scriptId, int lineNumber, int columnNumber, BreakpointSource source, const String& condition)
+{
+    String breakpointId = generateBreakpointIdDart(scriptId, lineNumber, columnNumber, source);
+    ScriptBreakpoint breakpoint(lineNumber, columnNumber, condition);
+    resolveBreakpoint(breakpointId, scriptId, breakpoint, source);
+}
+
+void DartInspectorDebuggerAgent::removeBreakpoint(const String& scriptId, int lineNumber, int columnNumber, BreakpointSource source)
+{
+    removeBreakpoint(generateBreakpointIdDart(scriptId, lineNumber, columnNumber, source));
+}
+
+void DartInspectorDebuggerAgent::reset()
+{
+    m_scripts.clear();
+    m_breakpointIdToDebugServerBreakpointIds.clear();
+}
+
+DartScriptDebugServer& DartInspectorDebuggerAgent::scriptDebugServer()
+{
+    return DartScriptDebugServer::shared();
+}
+
+} // namespace blink
+