Added Dartium changes onto 45.0.2454.104

Source/bindings/core/dart/DartInjectedScript.cpp

+/*
+ * 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:
+ *
+ *     * 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.
+ */
+
+#include "config.h"
+
+#include "bindings/core/dart/DartInjectedScript.h"
+
+#include "bindings/core/dart/DartDOMWrapper.h"
+#include "bindings/core/dart/DartHandleProxy.h"
+#include "bindings/core/dart/DartJsInterop.h"
+#include "bindings/core/dart/DartScriptDebugServer.h"
+#include "bindings/core/dart/DartScriptState.h"
+#include "bindings/core/dart/DartUtilities.h"
+#include "bindings/core/dart/V8Converter.h"
+#include "bindings/core/v8/ScriptFunctionCall.h"
+#include "core/inspector/InjectedScriptHost.h"
+#include "core/inspector/JSONParser.h"
+#include "platform/JSONValues.h"
+
+using blink::TypeBuilder::Array;
+using blink::TypeBuilder::Debugger::CallFrame;
+using blink::TypeBuilder::Debugger::Location;
+using blink::TypeBuilder::Debugger::Scope;
+using blink::TypeBuilder::Runtime::PropertyDescriptor;
+using blink::TypeBuilder::Runtime::InternalPropertyDescriptor;
+using blink::TypeBuilder::Debugger::FunctionDetails;
+using blink::TypeBuilder::Runtime::RemoteObject;
+using blink::TypeBuilder::Runtime::PropertyPreview;
+
+namespace blink {
+
+Dart_Handle getLibraryUrl(Dart_Handle handle)
+{
+    intptr_t libraryId = 0;
+    Dart_Handle ALLOW_UNUSED result = Dart_LibraryId(handle, &libraryId);
+    ASSERT(!Dart_IsError(result));
+    Dart_Handle libraryUrl = Dart_GetLibraryURL(libraryId);
+    ASSERT(Dart_IsString(libraryUrl));
+    return libraryUrl;
+}
+
+Dart_Handle getObjectCompletions(Dart_Handle object, Dart_Handle library)
+{
+    Dart_Handle args[2] = {object, getLibraryUrl(library)};
+    return DartUtilities::invokeUtilsMethod("getObjectCompletions", 2, args);
+}
+
+Dart_Handle getLibraryCompletions(Dart_Handle library)
+{
+    Dart_Handle libraryUrl = getLibraryUrl(library);
+    return DartUtilities::invokeUtilsMethod("getLibraryCompletions", 1, &libraryUrl);
+}
+
+Dart_Handle getLibraryCompletionsIncludingImports(Dart_Handle library)
+{
+    Dart_Handle libraryUrl = getLibraryUrl(library);
+    return DartUtilities::invokeUtilsMethod("getLibraryCompletionsIncludingImports", 1, &libraryUrl);
+}
+
+Dart_Handle getObjectProperties(Dart_Handle object, bool ownProperties, bool accessorPropertiesOnly)
+{
+    Dart_Handle args[3] = {object, DartUtilities::boolToDart(ownProperties), DartUtilities::boolToDart(accessorPropertiesOnly)};
+    return DartUtilities::invokeUtilsMethod("getObjectProperties", 3, args);
+}
+
+Dart_Handle getObjectPropertySafe(Dart_Handle object, const String& propertyName)
+{
+    Dart_Handle args[2] = {object, DartUtilities::stringToDartString(propertyName)};
+    return DartUtilities::invokeUtilsMethod("getObjectPropertySafe", 2, args);
+}
+
+Dart_Handle getObjectClassProperties(Dart_Handle object, bool ownProperties, bool accessorPropertiesOnly)
+{
+    Dart_Handle args[3] = {object, DartUtilities::boolToDart(ownProperties), DartUtilities::boolToDart(accessorPropertiesOnly)};
+    return DartUtilities::invokeUtilsMethod("getObjectClassProperties", 3, args);
+}
+
+Dart_Handle getClassProperties(Dart_Handle kind, bool ownProperties, bool accessorPropertiesOnly)
+{
+    Dart_Handle args[3] = {kind, DartUtilities::boolToDart(ownProperties), DartUtilities::boolToDart(accessorPropertiesOnly)};
+    return DartUtilities::invokeUtilsMethod("getClassProperties", 3, args);
+}
+
+Dart_Handle getLibraryProperties(Dart_Handle library, bool ownProperties, bool accessorPropertiesOnly)
+{
+    Dart_Handle args[3] = {getLibraryUrl(library), DartUtilities::boolToDart(ownProperties), DartUtilities::boolToDart(accessorPropertiesOnly)};
+    return DartUtilities::invokeUtilsMethod("getLibraryProperties", 3, args);
+}
+
+Dart_Handle describeFunction(Dart_Handle function)
+{
+    return DartUtilities::invokeUtilsMethod("describeFunction", 1, &function);
+}
+
+Dart_Handle getInvocationTrampolineDetails(Dart_Handle function)
+{
+    return DartUtilities::invokeUtilsMethod("getInvocationTrampolineDetails", 1, &function);
+}
+
+Dart_Handle findReceiver(Dart_Handle locals)
+{
+    intptr_t length = 0;
+    Dart_Handle ALLOW_UNUSED result = Dart_ListLength(locals, &length);
+    ASSERT(!Dart_IsError(result));
+    ASSERT(length % 2 == 0);
+    String thisStr("this");
+    for (intptr_t i = 0; i < length; i+= 2) {
+        Dart_Handle name = Dart_ListGetAt(locals, i);
+        if (DartUtilities::toString(name) == thisStr) {
+            Dart_Handle ret = Dart_ListGetAt(locals, i + 1);
+            return Dart_IsNull(ret) ? 0 : ret;
+        }
+    }
+    return 0;
+}
+
+Dart_Handle lookupEnclosingType(Dart_Handle functionOwner)
+{
+    // Walk up the chain of function owners until we reach a type or library
+    // handle.
+    while (Dart_IsFunction(functionOwner))
+        functionOwner = Dart_FunctionOwner(functionOwner);
+    return functionOwner;
+}
+
+String stripVariableName(const String& name)
+{
+    size_t index = name.find('@');
+    return index == kNotFound ? name : name.left(index);
+}
+
+String stripFunctionDescription(const String& description)
+{
+    size_t index = description.find('{');
+    if (index != kNotFound)
+        return description.left(index);
+    index = description.find(';');
+    if (index != kNotFound)
+        return description.left(index);
+    return description;
+}
+
+DartDebuggerObject::DartDebuggerObject(Dart_PersistentHandle h, const String& objectGroup, Kind kind)
+    : m_handle(h)
+    , m_group(objectGroup)
+    , m_kind(kind)
+{
+}
+
+DartDebuggerObject::~DartDebuggerObject()
+{
+    Dart_DeletePersistentHandle(m_handle);
+}
+
+DartInjectedScript::DartInjectedScript()
+    : m_name("DartInjectedScript")
+    , m_inspectedStateAccessCheck(0)
+    , m_scriptState(0)
+    , m_nextObjectId(1)
+    , m_host(0)
+    , m_consoleApi(0)
+{
+}
+
+DartInjectedScript::DartInjectedScript(DartScriptState* scriptState, InjectedScriptManager::InspectedStateAccessCheck accessCheck, int injectedScriptId, InjectedScriptHost* host, InjectedScriptManager* injectedScriptManager)
+    : m_name("DartInjectedScript")
+    , m_inspectedStateAccessCheck(accessCheck)
+    , m_scriptState(scriptState)
+    , m_nextObjectId(1)
+    , m_injectedScriptId(injectedScriptId)
+    , m_host(host)
+    , m_injectedScriptManager(injectedScriptManager)
+    , m_consoleApi(0)
+{
+}
+
+bool DartInjectedScript::canAccessInspectedWindow() const
+{
+    return m_inspectedStateAccessCheck(scriptState());
+}
+
+bool DartInjectedScript::validateObjectId(const String& objectId)
+{
+    RefPtr<JSONValue> parsedObjectId = parseJSON(objectId);
+    if (parsedObjectId && parsedObjectId->type() == JSONValue::TypeObject) {
+        long injectedScriptId = 0;
+        bool success = parsedObjectId->asObject()->getNumber("injectedScriptId", &injectedScriptId);
+        return success && injectedScriptId == m_injectedScriptId;
+    }
+    return false;
+}
+
+void DartInjectedScript::packageResult(Dart_Handle dartHandle, DartDebuggerObject::Kind kind, const String& objectGroup, ErrorString* errorString, bool returnByValue, bool generatePreview, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown)
+{
+    switch (kind) {
+    case DartDebuggerObject::Object:
+        packageObjectResult(dartHandle, objectGroup, errorString, returnByValue, generatePreview, result, wasThrown);
+        return;
+    case DartDebuggerObject::ObjectClass:
+        packageObjectClassResult(dartHandle, objectGroup, errorString, returnByValue, generatePreview, result, wasThrown);
+        return;
+    case DartDebuggerObject::Function:
+        packageFunctionResult(dartHandle, objectGroup, errorString, returnByValue, generatePreview, result, wasThrown);
+        return;
+    case DartDebuggerObject::Method:
+        packageMethodResult(dartHandle, objectGroup, errorString, returnByValue, generatePreview, result, wasThrown);
+        return;
+    case DartDebuggerObject::Class:
+    case DartDebuggerObject::StaticClass:
+        packageClassResult(dartHandle, kind, objectGroup, errorString, returnByValue, generatePreview, result, wasThrown);
+        return;
+    case DartDebuggerObject::Library:
+    case DartDebuggerObject::CurrentLibrary:
+        packageLibraryResult(dartHandle, kind, objectGroup, errorString, returnByValue, generatePreview, result, wasThrown);
+        return;
+    case DartDebuggerObject::Isolate:
+        packageIsolateResult(dartHandle, objectGroup, errorString, returnByValue, generatePreview, result, wasThrown);
+        return;
+    case DartDebuggerObject::LocalVariables:
+        packageLocalVariablesResult(dartHandle, objectGroup, errorString, returnByValue, generatePreview, result, wasThrown);
+        return;
+    case DartDebuggerObject::Error:
+        packageErrorResult(dartHandle, objectGroup, errorString, returnByValue, generatePreview, result, wasThrown);
+        return;
+    default:
+        ASSERT_NOT_REACHED();
+    }
+}
+
+DartInjectedScript::~DartInjectedScript()
+{
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+
+    for (DebuggerObjectMap::iterator it = m_objects.begin(); it != m_objects.end(); ++it) {
+        delete it->value;
+    }
+
+    if (m_consoleApi)
+        Dart_DeletePersistentHandle(m_consoleApi);
+}
+
+Dart_Handle DartInjectedScript::consoleApi()
+{
+/* TODO(terry): Need to re-enable when we figure out how to do:
+ *
+ *       Dart_Handle host = DartInjectedScriptHost::toDart(m_host);
+ */
+#if 0
+    if (!m_consoleApi) {
+        Dart_Handle host = DartInjectedScriptHost::toDart(m_host);
+        Dart_SetPeer(host, this);
+        Dart_Handle consoleApi = DartUtilities::invokeUtilsMethod("consoleApi", 1, &host);
+        ASSERT(!Dart_IsError(consoleApi));
+        m_consoleApi = Dart_NewPersistentHandle(consoleApi);
+    }
+#endif
+    return m_consoleApi;
+}
+
+Dart_Handle DartInjectedScript::evaluateHelper(Dart_Handle target, const String& rawExpression, Dart_Handle localVariables, bool includeCommandLineAPI, Dart_Handle& exception)
+{
+    DartDOMData* ALLOW_UNUSED domData = DartDOMData::current();
+    ASSERT(domData);
+    ASSERT(Dart_IsList(localVariables) || Dart_IsNull(localVariables));
+
+    Dart_Handle expression = DartUtilities::stringToDart(rawExpression);
+
+    if (includeCommandLineAPI) {
+        ASSERT(m_host);
+        // Vector of local variables and injected console variables.
+        Vector<Dart_Handle> locals;
+        if (Dart_IsList(localVariables)) {
+            DartUtilities::extractListElements(localVariables, exception, locals);
+            ASSERT(!exception);
+        }
+
+        ScriptState* v8ScriptState = DartUtilities::v8ScriptStateForCurrentIsolate();
+        for (unsigned i = 0; i < 6; i++) {
+            ScriptValue value =  m_host->inspectedObject(i)->get(v8ScriptState);
+            v8::TryCatch tryCatch;
+            v8::Handle<v8::Value> v8Value = value.v8Value();
+            if (v8Value.IsEmpty())
+                break;
+            Dart_Handle dartValue = DartHandleProxy::unwrapValue(v8Value);
+            ASSERT(!Dart_IsError(dartValue));
+            if (Dart_IsNull(dartValue))
+                continue;
+            locals.append(DartUtilities::stringToDartString(String::format("$%d", i)));
+            locals.append(dartValue);
+        }
+
+        Dart_Handle list = consoleApi();
+        intptr_t length = 0;
+        ASSERT(Dart_IsList(list));
+        Dart_Handle ALLOW_UNUSED ret = Dart_ListLength(list, &length);
+        ASSERT(!(length % 2));
+        ASSERT(!Dart_IsError(ret));
+        for (intptr_t i = 0; i < length; i += 2) {
+            Dart_Handle name = Dart_ListGetAt(list, i);
+            ASSERT(Dart_IsString(name));
+            locals.append(name);
+            Dart_Handle value = Dart_ListGetAt(list, i+1);
+            ASSERT(!Dart_IsError(value));
+            locals.append(value);
+        }
+        localVariables = DartUtilities::toList(locals, exception);
+        ASSERT(!exception);
+    }
+
+    Dart_Handle wrapExpressionArgs[3] = { expression, localVariables, DartUtilities::boolToDart(includeCommandLineAPI) };
+    Dart_Handle wrappedExpressionTuple =
+        DartUtilities::invokeUtilsMethod("wrapExpressionAsClosure", 3, wrapExpressionArgs);
+    ASSERT(Dart_IsList(wrappedExpressionTuple));
+    Dart_Handle wrappedExpression = Dart_ListGetAt(wrappedExpressionTuple, 0);
+    Dart_Handle wrappedExpressionArgs = Dart_ListGetAt(wrappedExpressionTuple, 1);
+    // TODO(jacobr): replace most of this logic with Dart_ActivationFrameEvaluate.
+
+    ASSERT(Dart_IsString(wrappedExpression));
+    Dart_Handle closure = Dart_EvaluateExpr(target, wrappedExpression);
+    // There was a parse error. FIXME: consider cleaning up the line numbers in
+    // the error message.
+    if (Dart_IsError(closure)) {
+        exception = closure;
+        return 0;
+    }
+
+    // Invoke the closure passing in the expression arguments specified by
+    // wrappedExpressionTuple.
+    ASSERT(DartUtilities::isFunction(domData, closure));
+    intptr_t length = 0;
+    Dart_ListLength(wrappedExpressionArgs, &length);
+    Vector<Dart_Handle> dartFunctionArgs;
+    for (intptr_t i = 0; i < length; i ++)
+        dartFunctionArgs.append(Dart_ListGetAt(wrappedExpressionArgs, i));
+
+    Dart_Handle result = Dart_InvokeClosure(closure, dartFunctionArgs.size(), dartFunctionArgs.data());
+    if (Dart_IsError(result)) {
+        exception = result;
+        return Dart_Null();
+    }
+    return result;
+}
+
+void DartInjectedScript::evaluateAndPackageResult(Dart_Handle target, const String& rawExpression, Dart_Handle localVariables, bool includeCommandLineAPI, const String& objectGroup, ErrorString* errorString, bool returnByValue, bool generatePreview, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown, RefPtr<TypeBuilder::Debugger::ExceptionDetails>* exceptionDetails)
+{
+    Dart_Handle exception = 0;
+    {
+        Dart_Handle evalResult = evaluateHelper(target, rawExpression, localVariables, includeCommandLineAPI, exception);
+        if (exception)
+            goto fail;
+        packageResult(evalResult, inferKind(evalResult), objectGroup, errorString, returnByValue, generatePreview, result, wasThrown);
+        return;
+    }
+fail:
+    ASSERT(exception);
+    packageResult(exception, DartDebuggerObject::Error, objectGroup, errorString, returnByValue, generatePreview, result, wasThrown);
+    ASSERT(Dart_IsError(exception));
+    if (exceptionDetails) {
+        *exceptionDetails = TypeBuilder::Debugger::ExceptionDetails::create().setText(Dart_GetError(exception)).release();
+        Dart_StackTrace trace;
+        Dart_Handle ALLOW_UNUSED ret = Dart_GetStackTraceFromError(exception, &trace);
+        if (Dart_IsInstance(ret)) {
+            // Only unhandled exception error handles have stacktraces.
+            (*exceptionDetails)->setStackTrace(consoleCallFrames(trace));
+        }
+    }
+}
+
+PassRefPtr<Array<TypeBuilder::Console::CallFrame> > DartInjectedScript::consoleCallFrames(Dart_StackTrace trace)
+{
+    intptr_t length = 0;
+    Dart_Handle ALLOW_UNUSED result;
+    RefPtr<Array<TypeBuilder::Console::CallFrame> > ret = Array<TypeBuilder::Console::CallFrame>::create();
+    result = Dart_StackTraceLength(trace, &length);
+    ASSERT(!Dart_IsError(result));
+    DartScriptDebugServer& debugServer = DartScriptDebugServer::shared();
+    for (intptr_t i = 0; i < length; i++) {
+        Dart_ActivationFrame frame = 0;
+        result = Dart_GetActivationFrame(trace, i, &frame);
+        ASSERT(!Dart_IsError(result));
+        Dart_Handle functionName = 0;
+        Dart_CodeLocation location;
+        Dart_ActivationFrameGetLocation(frame, &functionName, 0, &location);
+        const String& url = DartUtilities::toString(location.script_url);
+        intptr_t line = 0;
+        intptr_t column = 0;
+        Dart_ActivationFrameInfo(frame, 0, 0, &line, &column);
+
+        ret->addItem(TypeBuilder::Console::CallFrame::create()
+            .setFunctionName(DartUtilities::toString(functionName))
+            .setScriptId(debugServer.getScriptId(url, Dart_CurrentIsolate()))
+            .setUrl(url)
+            .setLineNumber(line-1)
+            .setColumnNumber(column)
+            .release());
+    }
+    return ret;
+}
+
+void DartInjectedScript::packageObjectResult(Dart_Handle dartHandle, const String& objectGroup, ErrorString* errorString, bool returnByValue, bool generatePreview, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown)
+{
+    ASSERT(Dart_IsInstance(dartHandle) || Dart_IsNull(dartHandle));
+
+    // FIXMEDART: support returnByValue for Dart types that are expressible as JSON.
+    bool wasThrownVal = false;
+    Dart_Handle exception = 0;
+    if (Dart_IsError(dartHandle)) {
+        wasThrownVal = true;
+        Dart_Handle exception = Dart_ErrorGetException(dartHandle);
+        ASSERT(Dart_IsInstance(exception));
+        if (!Dart_IsInstance(exception)) {
+            *errorString = Dart_GetError(dartHandle);
+            return;
+        }
+        dartHandle = exception;
+    }
+
+    // Primitive value
+    RefPtr<JSONValue> value = nullptr;
+    TypeBuilder::Runtime::RemoteObject::Type::Enum remoteObjectType = TypeBuilder::Runtime::RemoteObject::Type::Object;
+    ASSERT(Dart_IsInstance(dartHandle) || Dart_IsNull(dartHandle));
+
+    if (Dart_IsNull(dartHandle)) {
+        value = JSONValue::null();
+    } else {
+        if (Dart_IsString(dartHandle)) {
+            remoteObjectType = TypeBuilder::Runtime::RemoteObject::Type::String;
+            value = JSONString::create(DartUtilities::toString(dartHandle));
+        } else if (Dart_IsDouble(dartHandle)) {
+            // FIXMEDART: add an extra entry for int?
+            remoteObjectType = TypeBuilder::Runtime::RemoteObject::Type::Number;
+            value = JSONBasicValue::create(DartUtilities::dartToDouble(dartHandle, exception));
+            ASSERT(!exception);
+        } else if (Dart_IsNumber(dartHandle)) {
+            // FIXMEDART: handle ints that are larger than 50 bits.
+            remoteObjectType = TypeBuilder::Runtime::RemoteObject::Type::Number;
+            value = JSONBasicValue::create(DartUtilities::dartToDouble(dartHandle, exception));
+            ASSERT(!exception);
+        } else if (Dart_IsBoolean(dartHandle)) {
+            remoteObjectType = TypeBuilder::Runtime::RemoteObject::Type::Boolean;
+            value = JSONBasicValue::create(DartUtilities::dartToBool(dartHandle, exception));
+            ASSERT(!exception);
+        }
+    }
+
+    String typeName;
+    String description;
+    bool isNode = false;
+    if (Dart_IsNull(dartHandle)) {
+        typeName = "null";
+        description = "null";
+    } else {
+        Dart_Handle dartType = Dart_InstanceGetType(dartHandle);
+        Dart_Handle typeNameHandle = Dart_TypeName(dartType);
+        ASSERT(!Dart_IsError(typeNameHandle));
+        typeName = DartUtilities::dartToString(typeNameHandle, exception);
+        description = DartUtilities::dartToString(Dart_ToString(dartHandle), exception);
+        if (exception) {
+            description = String::format("Instance of '%s'", typeName.utf8().data());
+            exception = 0;
+        }
+        ASSERT(!exception);
+
+        if (DartUtilities::isNode(dartHandle))
+            isNode = true;
+    }
+
+    RefPtr<RemoteObject> remoteObject = TypeBuilder::Runtime::RemoteObject::create().setType(remoteObjectType).release();
+    remoteObject->setLanguage("Dart");
+    remoteObject->setClassName(typeName);
+    remoteObject->setDescription(description);
+    if (value)
+        remoteObject->setValue(value);
+
+    if (isNode)
+        remoteObject->setSubtype(RemoteObject::Subtype::Node);
+
+    // FIXMEDART: generate preview if generatePreview is true.
+    String objectId = cacheObject(dartHandle, objectGroup, DartDebuggerObject::Object);
+    remoteObject->setObjectId(objectId);
+    *result = remoteObject;
+    if (wasThrown) {
+        *wasThrown = exception || wasThrownVal;
+    }
+}
+
+void DartInjectedScript::packageObjectClassResult(Dart_Handle dartHandle, const String& objectGroup, ErrorString* errorString, bool returnByValue, bool generatePreview, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown)
+{
+    ASSERT(Dart_IsInstance(dartHandle) || Dart_IsNull(dartHandle));
+    bool wasThrownVal = false;
+    Dart_Handle exception = 0;
+
+    RefPtr<RemoteObject> remoteObject = TypeBuilder::Runtime::RemoteObject::create().setType(TypeBuilder::Runtime::RemoteObject::Type::Object).release();
+    remoteObject->setLanguage("Dart");
+
+    Dart_Handle typeHandle = Dart_InstanceGetType(dartHandle);
+    String typeName = DartUtilities::toString(Dart_TypeName(typeHandle));
+
+    remoteObject->setClassName(typeName);
+    remoteObject->setDescription(typeName);
+
+    // Don't generate a preview for types.
+    String objectId = cacheObject(dartHandle, objectGroup, DartDebuggerObject::ObjectClass);
+    remoteObject->setObjectId(objectId);
+    *result = remoteObject;
+    if (wasThrown)
+        *wasThrown = exception || wasThrownVal;
+}
+
+void DartInjectedScript::packageClassResult(Dart_Handle dartHandle, DartDebuggerObject::Kind kind, const String& objectGroup, ErrorString* errorString, bool returnByValue, bool generatePreview, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown)
+{
+    bool wasThrownVal = false;
+    Dart_Handle exception = 0;
+
+    RefPtr<RemoteObject> remoteObject = TypeBuilder::Runtime::RemoteObject::create().setType(TypeBuilder::Runtime::RemoteObject::Type::Object).release();
+    remoteObject->setLanguage("Dart");
+    String typeName = DartUtilities::toString(Dart_TypeName(dartHandle));
+    String typeDescription("class ");
+    typeDescription.append(typeName);
+
+    remoteObject->setClassName(typeName);
+    remoteObject->setDescription(typeDescription);
+
+    // Don't generate a preview for types.
+    String objectId = cacheObject(dartHandle, objectGroup, kind);
+    remoteObject->setObjectId(objectId);
+    *result = remoteObject;
+    if (wasThrown)
+        *wasThrown = exception || wasThrownVal;
+}
+
+void DartInjectedScript::packageFunctionResult(Dart_Handle dartHandle, const String& objectGroup, ErrorString* errorString, bool returnByValue, bool generatePreview, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown)
+{
+    ASSERT(DartUtilities::isFunction(DartDOMData::current(), dartHandle));
+    bool wasThrownVal = false;
+    Dart_Handle exception = 0;
+
+    RefPtr<RemoteObject> remoteObject = TypeBuilder::Runtime::RemoteObject::create().setType(TypeBuilder::Runtime::RemoteObject::Type::Function).release();
+    remoteObject->setLanguage("Dart");
+    remoteObject->setClassName("<Dart Function>");
+    remoteObject->setDescription(stripFunctionDescription(DartUtilities::toString(describeFunction(dartHandle))));
+
+    String objectId = cacheObject(dartHandle, objectGroup, DartDebuggerObject::Function);
+    remoteObject->setObjectId(objectId);
+    *result = remoteObject;
+    if (wasThrown) {
+        *wasThrown = exception || wasThrownVal;
+    }
+}
+
+void DartInjectedScript::packageMethodResult(Dart_Handle dartHandle, const String& objectGroup, ErrorString* errorString, bool returnByValue, bool generatePreview, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown)
+{
+    ASSERT(DartUtilities::isFunction(DartDOMData::current(), dartHandle));
+    bool wasThrownVal = false;
+    Dart_Handle exception = 0;
+
+    RefPtr<RemoteObject> remoteObject = TypeBuilder::Runtime::RemoteObject::create().setType(TypeBuilder::Runtime::RemoteObject::Type::Function).release();
+    remoteObject->setLanguage("Dart");
+    remoteObject->setClassName("<Dart Method>");
+    remoteObject->setDescription(stripFunctionDescription(DartUtilities::toString(describeFunction(dartHandle))));
+
+    String objectId = cacheObject(dartHandle, objectGroup, DartDebuggerObject::Method);
+    remoteObject->setObjectId(objectId);
+    *result = remoteObject;
+    if (wasThrown)
+        *wasThrown = exception || wasThrownVal;
+}
+
+void DartInjectedScript::packageLocalVariablesResult(Dart_Handle dartHandle, const String& objectGroup, ErrorString* errorString, bool returnByValue, bool generatePreview, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown)
+{
+    bool wasThrownVal = false;
+    Dart_Handle exception = 0;
+
+    RefPtr<RemoteObject> remoteObject = TypeBuilder::Runtime::RemoteObject::create().setType(TypeBuilder::Runtime::RemoteObject::Type::Object).release();
+    remoteObject->setLanguage("Dart");
+    remoteObject->setClassName("Object");
+    remoteObject->setDescription("Local Variables");
+
+    String objectId = cacheObject(dartHandle, objectGroup, DartDebuggerObject::LocalVariables);
+    remoteObject->setObjectId(objectId);
+    *result = remoteObject;
+    if (wasThrown)
+        *wasThrown = exception || wasThrownVal;
+}
+
+void DartInjectedScript::packageErrorResult(Dart_Handle dartHandle, const String& objectGroup, ErrorString* errorString, bool returnByValue, bool generatePreview, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown)
+{
+    ASSERT(Dart_IsError(dartHandle));
+    RefPtr<RemoteObject> remoteObject = TypeBuilder::Runtime::RemoteObject::create().setType(TypeBuilder::Runtime::RemoteObject::Type::Object).release();
+    remoteObject->setLanguage("Dart");
+    remoteObject->setClassName("Error");
+    remoteObject->setDescription(Dart_GetError(dartHandle));
+
+    Dart_Handle exception = Dart_ErrorGetException(dartHandle);
+    String objectId = cacheObject(exception, objectGroup, DartDebuggerObject::Error);
+    remoteObject->setObjectId(objectId);
+    *result = remoteObject;
+    if (wasThrown)
+        *wasThrown = true;
+}
+
+void DartInjectedScript::packageLibraryResult(Dart_Handle dartHandle, DartDebuggerObject::Kind kind, const String& objectGroup, ErrorString* errorString, bool returnByValue, bool generatePreview, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown)
+{
+    ASSERT(Dart_IsLibrary(dartHandle));
+    bool wasThrownVal = false;
+    intptr_t libraryId = 0;
+    Dart_Handle exception = 0;
+    Dart_Handle ALLOW_UNUSED ret;
+    ret = Dart_LibraryId(dartHandle, &libraryId);
+    ASSERT(!Dart_IsError(ret));
+
+    // FIXMEDART: Demangle library name.
+    String libraryName = DartUtilities::toString(Dart_LibraryName(dartHandle));
+    String libraryUri = DartUtilities::toString(Dart_GetLibraryURL(libraryId));
+    if (libraryName == "")
+        libraryName = libraryUri;
+
+    RefPtr<RemoteObject> remoteObject = TypeBuilder::Runtime::RemoteObject::create().setType(TypeBuilder::Runtime::RemoteObject::Type::Object).release();
+    remoteObject->setLanguage("Dart");
+    remoteObject->setClassName(libraryUri);
+    remoteObject->setDescription(libraryName);
+    String objectId = cacheObject(dartHandle, objectGroup, kind);
+    remoteObject->setObjectId(objectId);
+    *result = remoteObject;
+    if (wasThrown)
+        *wasThrown = exception || wasThrownVal;
+}
+
+void DartInjectedScript::packageIsolateResult(Dart_Handle dartHandle, const String& objectGroup, ErrorString* errorString, bool returnByValue, bool generatePreview, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown)
+{
+    RefPtr<RemoteObject> remoteObject = TypeBuilder::Runtime::RemoteObject::create().setType(TypeBuilder::Runtime::RemoteObject::Type::Object).release();
+
+    String isolateName = DartUtilities::toString(Dart_DebugName());
+
+    remoteObject->setLanguage("Dart");
+    remoteObject->setClassName("Dart Isolate");
+    remoteObject->setDescription(isolateName);
+    String objectId = cacheObject(dartHandle, objectGroup, DartDebuggerObject::Isolate);
+    remoteObject->setObjectId(objectId);
+    *result = remoteObject;
+}
+
+Dart_Handle DartInjectedScript::library()
+{
+    ASSERT(m_scriptState);
+    return Dart_GetLibraryFromId(m_scriptState->libraryId());
+}
+
+void DartInjectedScript::evaluate(ErrorString* errorString, const String& expression, const String& objectGroup, bool includeCommandLineAPI, bool returnByValue, bool generatePreview, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown, RefPtr<TypeBuilder::Debugger::ExceptionDetails>* exceptionDetails)
+{
+    if (!m_scriptState) {
+        *errorString = "Invalid DartInjectedScript";
+        return;
+    }
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+    V8Scope v8scope(DartDOMData::current());
+    evaluateAndPackageResult(library(), expression, Dart_Null(), includeCommandLineAPI, objectGroup, errorString, returnByValue, generatePreview, result, wasThrown, exceptionDetails);
+}
+
+void DartInjectedScript::callFunctionOn(ErrorString* errorString, const String& objectId, const String& expression, const String& arguments, bool returnByValue, bool generatePreview, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown)
+{
+    Dart_Handle exception = 0;
+    String objectGroup;
+    if (!m_scriptState) {
+        *errorString = "Invalid DartInjectedScript";
+        return;
+    }
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+    {
+        DartDebuggerObject* object = lookupObject(objectId);
+        if (!object) {
+            *errorString = "Object has been deleted";
+            return;
+        }
+        objectGroup = object->group();
+        Vector<Dart_Handle> dartFunctionArgs;
+        if (arguments.length()) {
+            RefPtr<JSONValue> parsedArguments = parseJSON(arguments);
+            if (!parsedArguments.get()) {
+                *errorString = "Unable to parse arguments json";
+                return;
+            }
+            if (!parsedArguments->isNull()) {
+                if (parsedArguments->type() != JSONValue::TypeArray) {
+                    *errorString = "Invalid arguments";
+                    return;
+                }
+                RefPtr<JSONArray> argumentsArray = parsedArguments->asArray();
+                for (JSONArray::iterator it = argumentsArray->begin(); it != argumentsArray->end(); ++it) {
+                    RefPtr<JSONObject> arg;
+                    if (!(*it)->asObject(&arg)) {
+                        *errorString = "Invalid argument passed to callFunctionOn";
+                        return;
+                    }
+                    String argObjectId;
+
+                    if (!arg->getString("objectId", &argObjectId)) {
+                        // FIXME: support primitive values passed as arguments as well.
+                        *errorString = "Unspecified object id";
+                    }
+
+                    DartDebuggerObject* argObject = lookupObject(argObjectId);
+                    if (!argObject) {
+                        *errorString = "Argument has been deleted";
+                        return;
+                    }
+                    dartFunctionArgs.append(argObject->handle());
+                }
+            }
+        }
+
+        Dart_Handle dartClosure = evaluateHelper(object->handle(), expression, Dart_Null(), false, exception);
+        if (exception)
+            goto fail;
+
+        if (Dart_IsError(dartClosure)) {
+            *errorString = Dart_GetError(dartClosure);
+            return;
+        }
+        if (!Dart_IsClosure(dartClosure)) {
+            *errorString = "Given expression does not evaluate to a closure";
+            return;
+        }
+        Dart_Handle evalResult = Dart_InvokeClosure(dartClosure, dartFunctionArgs.size(), dartFunctionArgs.data());
+        packageResult(evalResult, inferKind(evalResult), objectGroup, errorString, returnByValue, generatePreview, result, wasThrown);
+        return;
+    }
+fail:
+    ASSERT(exception);
+    packageResult(exception, DartDebuggerObject::Error, objectGroup, errorString, returnByValue, generatePreview, result, wasThrown);
+
+
+}
+
+void DartInjectedScript::evaluateOnCallFrame(ErrorString* errorString, const Dart_StackTrace callFrames, const String& callFrameId, const String& expression, const String& objectGroup, bool includeCommandLineAPI, bool returnByValue, bool generatePreview, RefPtr<RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown, RefPtr<TypeBuilder::Debugger::ExceptionDetails>* exceptionDetails)
+{
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+    // FIXMEDART: add v8Scope calls elsewhere.
+    V8Scope v8scope(DartDOMData::current());
+
+    Dart_ActivationFrame frame = callFrameForId(callFrames, callFrameId);
+    ASSERT(frame);
+    if (!frame) {
+        *errorString = "Call frame not found";
+        return;
+    }
+
+    Dart_Handle function = 0;
+    Dart_ActivationFrameGetLocation(frame, 0, &function, 0);
+    ASSERT(function);
+    Dart_Handle localVariables = Dart_GetLocalVariables(frame);
+    Dart_Handle thisHandle = findReceiver(localVariables);
+    Dart_Handle context = thisHandle ? thisHandle : lookupEnclosingType(function);
+    evaluateAndPackageResult(context, expression, localVariables, includeCommandLineAPI, objectGroup, errorString, returnByValue, generatePreview, result, wasThrown, exceptionDetails);
+}
+
+void DartInjectedScript::restartFrame(ErrorString* errorString, const Dart_StackTrace callFrames, const String& callFrameId, RefPtr<JSONObject>* result)
+{
+    *errorString = "Dart does not yet support restarting call frames";
+    return;
+}
+
+void DartInjectedScript::setVariableValue(ErrorString* errorString, const Dart_StackTrace callFrames, const String* callFrameIdOpt, const String* functionObjectIdOpt, int scopeNumber, const String& variableName, const String& newValueStr)
+{
+    if (!m_scriptState) {
+        *errorString = "Invalid DartInjectedScript";
+        return;
+    }
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+    *errorString = "Not supported by Dart.";
+    return;
+}
+
+void DartInjectedScript::getFunctionDetails(ErrorString* errorString, const String& functionId, RefPtr<FunctionDetails>* result)
+{
+    if (!m_scriptState) {
+        *errorString = "Invalid DartInjectedScript";
+        return;
+    }
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+    DartDebuggerObject* object = lookupObject(functionId);
+    if (!object) {
+        *errorString = "Object has been deleted";
+        return;
+    }
+
+    int line = 0;
+    int column = 0;
+    DartScriptDebugServer& debugServer = DartScriptDebugServer::shared();
+    Dart_Handle url;
+    Dart_Handle name = 0;
+    Dart_Handle exception = 0;
+
+    switch (object->kind()) {
+    case DartDebuggerObject::Function: {
+        Dart_CodeLocation location;
+        Dart_Handle ret = Dart_GetClosureInfo(object->handle(), &name, 0, &location);
+        if (Dart_IsError(ret) || !debugServer.resolveCodeLocation(location, &line, &column)) {
+            // Avoid returning an error for this case which can legitimately
+            // occur if the function was the result of calling Dart_EvaluateExpr.
+            RefPtr<Location> locationJson = Location::create()
+                .setScriptId("INVALID_SCRIPT_ID")
+                .setLineNumber(0);
+            *result = FunctionDetails::create().setLocation(locationJson).setFunctionName("DartClosure").release();
+            return;
+        }
+        url = location.script_url;
+        break;
+    }
+    case DartDebuggerObject::Method:
+        {
+            Dart_Handle ret = getInvocationTrampolineDetails(object->handle());
+
+            if (Dart_IsError(ret)) {
+                *errorString = Dart_GetError(ret);
+                return;
+            }
+            ASSERT(Dart_IsList(ret));
+            line = DartUtilities::toInteger(Dart_ListGetAt(ret, 0), exception);
+            column = DartUtilities::toInteger(Dart_ListGetAt(ret, 1), exception);
+            url = Dart_ListGetAt(ret, 2);
+            name = Dart_ListGetAt(ret, 3);
+            break;
+        }
+    default:
+        *errorString = "Object is not a function.";
+        return;
+    }
+
+    ASSERT(!exception);
+
+    RefPtr<Location> locationJson = Location::create()
+        .setScriptId(debugServer.getScriptId(DartUtilities::toString(url), Dart_CurrentIsolate()))
+        .setLineNumber(line - 1);
+    locationJson->setColumnNumber(column);
+
+    *result = FunctionDetails::create().setLocation(locationJson).setFunctionName(DartUtilities::toString(name)).release();
+}
+
+void addCompletions(Dart_Handle completions, RefPtr<TypeBuilder::Array<String> >* result)
+{
+    ASSERT(Dart_IsList(completions));
+    intptr_t length = 0;
+    Dart_ListLength(completions, &length);
+    for (intptr_t i = 0; i < length; ++i)
+        (*result)->addItem(DartUtilities::toString(Dart_ListGetAt(completions, i)));
+}
+
+void DartInjectedScript::getCompletionsOnCallFrame(ErrorString* errorString, const Dart_StackTrace callFrames, const String& callFrameId, const String& expression, RefPtr<TypeBuilder::Array<String> >* result)
+{
+    *result = TypeBuilder::Array<String>::create();
+    if (!m_scriptState) {
+        *errorString = "Invalid DartInjectedScript";
+        return;
+    }
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+    V8Scope v8scope(DartDOMData::current());
+
+    Dart_ActivationFrame frame = callFrameForId(callFrames, callFrameId);
+    ASSERT(frame);
+    if (!frame) {
+        *errorString = "Call frame not found";
+        return;
+    }
+
+    Dart_Handle function = 0;
+    Dart_ActivationFrameGetLocation(frame, 0, &function, 0);
+    ASSERT(function);
+    Dart_Handle localVariables = Dart_GetLocalVariables(frame);
+    Dart_Handle thisHandle = findReceiver(localVariables);
+    Dart_Handle enclosingType = lookupEnclosingType(function);
+    Dart_Handle context = thisHandle ? thisHandle : enclosingType;
+
+    if (expression.isEmpty()) {
+        addCompletions(getLibraryCompletionsIncludingImports(library()), result);
+        if (!Dart_IsLibrary(context)) {
+            addCompletions(getObjectCompletions(context, library()), result);
+        }
+        if (context != enclosingType) {
+            addCompletions(getObjectCompletions(enclosingType, library()), result);
+        }
+        intptr_t length = 0;
+        Dart_ListLength(localVariables, &length);
+        for (intptr_t i = 0; i < length; i += 2)
+            (*result)->addItem(stripVariableName(DartUtilities::toString(Dart_ListGetAt(localVariables, i))));
+    } else {
+        // FIXME: we can do better than evaluating the expression and getting
+        // all completions for that object if an exception is not thrown. For
+        // example run the Dart Analyzer to get completions of complex
+        // expressions without triggering side effects or failing for
+        // expressions that do not evaluate to a first class object. For
+        // example, the html library is imported with prefix html and the
+        // expression html is used.
+        Dart_Handle exception = 0;
+        Dart_Handle handle = evaluateHelper(context, expression, localVariables, true, exception);
+
+        // No completions if the expression cannot be evaluated.
+        if (exception)
+            return;
+        addCompletions(getObjectCompletions(handle, library()), result);
+    }
+}
+
+void DartInjectedScript::getCompletions(ErrorString* errorString, const String& expression, RefPtr<TypeBuilder::Array<String> >* result)
+{
+    *result = TypeBuilder::Array<String>::create();
+
+    if (!m_scriptState) {
+        *errorString = "Invalid DartInjectedScript";
+        return;
+    }
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+    V8Scope v8scope(DartDOMData::current());
+
+    Dart_Handle completions;
+    if (expression.isEmpty()) {
+        completions = getLibraryCompletionsIncludingImports(library());
+    } else {
+        // FIXME: we can do better than evaluating the expression and getting
+        // all completions for that object if an exception is not thrown. For
+        // example run the Dart Analyzer to get completions of complex
+        // expressions without triggering side effects or failing for
+        // expressions that do not evaluate to a first class object. For
+        // example, the html library is imported with prefix html and the
+        // expression html is used.
+        Dart_Handle exception = 0;
+        Dart_Handle handle = evaluateHelper(library(), expression, Dart_Null(), true, exception);
+        // No completions if the expression cannot be evaluated.
+        if (exception)
+            return;
+        completions = getObjectCompletions(handle, library());
+    }
+
+    addCompletions(completions, result);
+}
+
+void DartInjectedScript::getProperties(ErrorString* errorString, const String& objectId, bool ownProperties, bool accessorPropertiesOnly, RefPtr<Array<PropertyDescriptor> >* properties)
+{
+    Dart_Handle exception = 0;
+    if (!m_scriptState) {
+        *errorString = "Invalid DartInjectedScript";
+        return;
+    }
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+    DartDOMData* domData = DartDOMData::current();
+    V8Scope v8scope(domData);
+
+    DartDebuggerObject* object = lookupObject(objectId);
+    if (!object) {
+        *errorString = "Unknown objectId";
+        return;
+    }
+    Dart_Handle handle = object->handle();
+    String objectGroup = object->group();
+
+    *properties = Array<PropertyDescriptor>::create();
+    Dart_Handle propertiesList;
+    switch (object->kind()) {
+    case DartDebuggerObject::Object:
+    case DartDebuggerObject::Function:
+    case DartDebuggerObject::Error:
+        propertiesList = getObjectProperties(handle, ownProperties, accessorPropertiesOnly);
+        break;
+    case DartDebuggerObject::ObjectClass:
+        propertiesList = getObjectClassProperties(handle, ownProperties, accessorPropertiesOnly);
+        break;
+    case DartDebuggerObject::Method:
+        // There aren't any meaningful properties to display for a Dart method.
+        return;
+    case DartDebuggerObject::Class:
+    case DartDebuggerObject::StaticClass:
+        propertiesList = getClassProperties(handle, ownProperties, accessorPropertiesOnly);
+        break;
+    case DartDebuggerObject::Library:
+    case DartDebuggerObject::CurrentLibrary:
+        propertiesList = getLibraryProperties(handle, ownProperties, accessorPropertiesOnly);
+        break;
+    case DartDebuggerObject::LocalVariables:
+        {
+            if (accessorPropertiesOnly)
+                return;
+            ASSERT(Dart_IsList(handle));
+            intptr_t length = 0;
+            Dart_Handle ALLOW_UNUSED ret = Dart_ListLength(handle, &length);
+            ASSERT(!Dart_IsError(ret));
+            for (intptr_t i = 0; i < length; i += 2) {
+                const String& name = stripVariableName(DartUtilities::toString(Dart_ListGetAt(handle, i)));
+                Dart_Handle value = Dart_ListGetAt(handle, i + 1);
+                RefPtr<PropertyDescriptor> descriptor = PropertyDescriptor::create().setName(name).setConfigurable(false).setEnumerable(true).release();
+                descriptor->setValue(wrapDartHandle(value, inferKind(value), objectGroup, false));
+                descriptor->setWritable(false);
+                descriptor->setWasThrown(false);
+                descriptor->setIsOwn(true);
+                (*properties)->addItem(descriptor);
+            }
+            return;
+        }
+    case DartDebuggerObject::Isolate:
+        {
+            if (accessorPropertiesOnly)
+                return;
+
+            Dart_Handle libraries = handle;
+            ASSERT(Dart_IsList(libraries));
+
+            intptr_t librariesLength = 0;
+            Dart_Handle ALLOW_UNUSED result = Dart_ListLength(libraries, &librariesLength);
+            ASSERT(!Dart_IsError(result));
+            for (intptr_t i = 0; i < librariesLength; ++i) {
+                Dart_Handle libraryIdHandle = Dart_ListGetAt(libraries, i);
+                ASSERT(!Dart_IsError(libraryIdHandle));
+                Dart_Handle exception = 0;
+                int64_t libraryId = DartUtilities::toInteger(libraryIdHandle, exception);
+                const String& name = DartUtilities::toString(Dart_GetLibraryURL(libraryId));
+                RefPtr<PropertyDescriptor> descriptor = PropertyDescriptor::create().setName(name).setConfigurable(false).setEnumerable(true).release();
+                descriptor->setValue(wrapDartHandle(Dart_GetLibraryFromId(libraryId), DartDebuggerObject::Library, objectGroup, false));
+                descriptor->setWritable(false);
+                descriptor->setWasThrown(false);
+                descriptor->setIsOwn(true);
+                (*properties)->addItem(descriptor);
+                ASSERT(!exception);
+            }
+            return;
+        }
+    default:
+        ASSERT_NOT_REACHED();
+        *errorString = "Internal error";
+        return;
+    }
+
+    if (Dart_IsError(propertiesList)) {
+        *errorString = Dart_GetError(propertiesList);
+        return;
+    }
+
+    ASSERT(Dart_IsList(propertiesList));
+    intptr_t length = 0;
+    Dart_Handle ALLOW_UNUSED ret = Dart_ListLength(propertiesList, &length);
+    ASSERT(!Dart_IsError(ret));
+    ASSERT(!(length % 9));
+    for (intptr_t i = 0; i < length; i += 9) {
+        String name = DartUtilities::toString(Dart_ListGetAt(propertiesList, i));
+        Dart_Handle setter = Dart_ListGetAt(propertiesList, i + 1);
+        Dart_Handle getter = Dart_ListGetAt(propertiesList, i + 2);
+        Dart_Handle value = Dart_ListGetAt(propertiesList, i + 3);
+        bool hasValue = DartUtilities::dartToBool(Dart_ListGetAt(propertiesList, i + 4), exception);
+        ASSERT(!exception);
+        bool writable = DartUtilities::dartToBool(Dart_ListGetAt(propertiesList, i + 5), exception);
+        ASSERT(!exception);
+        bool isMethod = DartUtilities::dartToBool(Dart_ListGetAt(propertiesList, i + 6), exception);
+        ASSERT(!exception);
+        bool isOwn = DartUtilities::dartToBool(Dart_ListGetAt(propertiesList, i + 7), exception);
+        ASSERT(!exception);
+        bool wasThrown = DartUtilities::dartToBool(Dart_ListGetAt(propertiesList, i + 8), exception);
+        ASSERT(!exception);
+        RefPtr<PropertyDescriptor> descriptor = PropertyDescriptor::create().setName(name).setConfigurable(false).setEnumerable(true).release();
+        if (isMethod) {
+            ASSERT(hasValue);
+            descriptor->setValue(wrapDartHandle(value, DartDebuggerObject::Method, objectGroup, false));
+        } else {
+            if (hasValue)
+                descriptor->setValue(wrapDartHandle(value, inferKind(value), objectGroup, false));
+            if (!Dart_IsNull(setter))
+                descriptor->setSet(wrapDartHandle(setter, DartDebuggerObject::Method, objectGroup, false));
+            if (!Dart_IsNull(getter))
+                descriptor->setGet(wrapDartHandle(getter, DartDebuggerObject::Method, objectGroup, false));
+        }
+        descriptor->setWritable(writable);
+        descriptor->setWasThrown(wasThrown);
+        descriptor->setIsOwn(isOwn);
+
+        (*properties)->addItem(descriptor);
+    }
+
+    if (object->kind() == DartDebuggerObject::Object && !accessorPropertiesOnly && !Dart_IsNull(handle)) {
+        RefPtr<PropertyDescriptor> descriptor = PropertyDescriptor::create().setName("[[class]]").setConfigurable(false).setEnumerable(true).release();
+        descriptor->setValue(wrapDartHandle(handle, DartDebuggerObject::ObjectClass, objectGroup, false));
+        descriptor->setWritable(false);
+        descriptor->setWasThrown(false);
+        descriptor->setIsOwn(true);
+        (*properties)->addItem(descriptor);
+
+        if (DartDOMWrapper::subtypeOf(handle, JsObject::dartClassId)) {
+            JsObject* object = DartDOMWrapper::unwrapDartWrapper<JsObject>(domData, handle, exception);
+            if (!exception) {
+                descriptor = PropertyDescriptor::create().setName("[[JavaScript View]]").setConfigurable(false).setEnumerable(true).release();
+
+                V8ScriptState* v8ScriptState = DartUtilities::v8ScriptStateForCurrentIsolate();
+                InjectedScript v8InjectedScript = m_injectedScriptManager->injectedScriptFor(v8ScriptState);
+                ScriptValue v8ScriptValue(v8ScriptState, object->localV8Object());
+                descriptor->setValue(v8InjectedScript.wrapObject(v8ScriptValue, objectGroup, false));
+                descriptor->setWritable(false);
+                descriptor->setWasThrown(false);
+                descriptor->setIsOwn(true);
+                (*properties)->addItem(descriptor);
+            }
+        }
+    }
+}
+
+void DartInjectedScript::getInternalProperties(ErrorString* errorString, const String& objectId, RefPtr<Array<InternalPropertyDescriptor> >* properties)
+{
+    if (!m_scriptState) {
+        *errorString = "Invalid DartInjectedScript";
+        return;
+    }
+    // FIXME: add internal properties such as [[PrimitiveValue], [[BoundThis]], etc.
+    *properties = Array<InternalPropertyDescriptor>::create();
+}
+
+void DartInjectedScript::getProperty(ErrorString* errorString, const String& objectId, const RefPtr<JSONArray>& propertyPath, RefPtr<TypeBuilder::Runtime::RemoteObject>* result, TypeBuilder::OptOutput<bool>* wasThrown)
+{
+    if (!m_scriptState) {
+        *errorString = "Invalid DartInjectedScript";
+        return;
+    }
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartDOMData* domData = DartDOMData::current();
+    V8Scope v8scope(domData);
+    DartApiScope apiScope;
+
+    DartDebuggerObject* object = lookupObject(objectId);
+    if (!object) {
+        *errorString = "Unknown objectId";
+        return;
+    }
+    Dart_Handle handle = object->handle();
+    const String& objectGroup = object->group();
+
+
+    for (unsigned i = 0; i < propertyPath->length(); i++) {
+        RefPtr<JSONValue> value = propertyPath->get(i);
+        String propertyName;
+        if (!value->asString(&propertyName)) {
+            *errorString = "Invalid property name";
+            return;
+        }
+
+        handle = getObjectPropertySafe(handle, propertyName);
+        ASSERT(!Dart_IsError(handle));
+    }
+    *result = wrapDartHandle(handle, inferKind(handle), objectGroup, false);
+}
+
+Node* DartInjectedScript::nodeForObjectId(const String& objectId)
+{
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+
+    DartDebuggerObject* object = lookupObject(objectId);
+    if (!object || object->kind() != DartDebuggerObject::Object)
+        return 0;
+
+    Dart_Handle handle = object->handle();
+    if (DartUtilities::isNode(handle)) {
+        return DartUtilities::dartNodeToNativeNode(handle);
+    }
+
+    return 0;
+}
+
+String DartInjectedScript::cacheObject(Dart_Handle handle, const String& objectGroup, DartDebuggerObject::Kind kind)
+{
+    Dart_PersistentHandle persistentHandle = Dart_NewPersistentHandle(handle);
+    String objectId = String::format("{\"injectedScriptId\":%d,\"id\":%ld,\"isDart\":true}", m_injectedScriptId, m_nextObjectId);
+    m_nextObjectId++;
+
+    if (!objectGroup.isNull()) {
+        ObjectGroupMap::AddResult addResult = m_objectGroups.add(objectGroup, Vector<String>());
+        Vector<String>& groupMembers = addResult.storedValue->value;
+        groupMembers.append(objectId);
+    }
+
+    m_objects.set(objectId, new DartDebuggerObject(persistentHandle, objectGroup, kind));
+    return objectId;
+}
+
+void DartInjectedScript::releaseObject(const String& objectId)
+{
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+    ASSERT(validateObjectId(objectId));
+    DebuggerObjectMap::iterator it = m_objects.find(objectId);
+    if (it != m_objects.end()) {
+        delete it->value;
+        m_objects.remove(objectId);
+    }
+}
+
+String DartInjectedScript::getCallFrameId(int ordinal, int asyncOrdinal)
+{
+    // FIXME: what if the stack trace contains frames from multiple
+    // injectedScripts?
+    return String::format("{\"ordinal\":%d,\"injectedScriptId\":%d,\"asyncOrdinal\":%d,\"isDart\":true}", ordinal, m_injectedScriptId, asyncOrdinal);
+}
+
+Dart_ActivationFrame DartInjectedScript::callFrameForId(const Dart_StackTrace trace, const String& callFrameId)
+{
+    Dart_ActivationFrame frame = 0;
+    int ordinal = 0;
+    int asyncOrdinal = 0;
+    RefPtr<JSONValue> json = parseJSON(callFrameId);
+    if (json && json->type() == JSONValue::TypeObject) {
+        bool ALLOW_UNUSED success = json->asObject()->getNumber("ordinal", &ordinal);
+        ASSERT(success);
+        success = json->asObject()->getNumber("asyncOrdinal", &asyncOrdinal);
+        ASSERT(success);
+    } else {
+        ASSERT(json && json->type() == JSONValue::TypeObject);
+        return 0;
+    }
+    Dart_Handle ALLOW_UNUSED result;
+    if (asyncOrdinal > 0) { // 1-based index
+        // FIXMEDART: we never really supported async stacks for dart anyway.
+        return 0;
+    }
+    result = Dart_GetActivationFrame(trace, ordinal, &frame);
+    ASSERT(result);
+    return frame;
+}
+
+PassRefPtr<Array<CallFrame> > DartInjectedScript::wrapCallFrames(const Dart_StackTrace trace, int asyncOrdinal)
+{
+    intptr_t length = 0;
+    Dart_Handle ALLOW_UNUSED result;
+    RefPtr<Array<CallFrame> > ret = Array<CallFrame>::create();
+    result = Dart_StackTraceLength(trace, &length);
+    ASSERT(!Dart_IsError(result));
+    DartScriptDebugServer& debugServer = DartScriptDebugServer::shared();
+    Dart_Handle libraries = Dart_GetLibraryIds();
+    for (intptr_t i = 0; i < length; i++) {
+        Dart_ActivationFrame frame = 0;
+        result = Dart_GetActivationFrame(trace, i, &frame);
+        ASSERT(!Dart_IsError(result));
+        Dart_Handle functionName = 0;
+        Dart_Handle function = 0;
+        Dart_CodeLocation location;
+        Dart_ActivationFrameGetLocation(frame, &functionName, &function, &location);
+        const String& url = DartUtilities::toString(location.script_url);
+        intptr_t line = 0;
+        intptr_t column = 0;
+        Dart_ActivationFrameInfo(frame, 0, 0, &line, &column);
+        RefPtr<Location> locationJson = Location::create()
+            .setScriptId(debugServer.getScriptId(url, Dart_CurrentIsolate()))
+            .setLineNumber(line - 1);
+        locationJson->setColumnNumber(column);
+        Dart_Handle localVariables = Dart_GetLocalVariables(frame);
+        Dart_Handle thisHandle = findReceiver(localVariables);
+        Dart_Handle enclosingType = lookupEnclosingType(function);
+        RefPtr<TypeBuilder::Array<Scope> > scopeChain = TypeBuilder::Array<Scope>::create();
+        RefPtr<TypeBuilder::Runtime::RemoteObject> thisObject =
+            wrapDartHandle(thisHandle ? thisHandle : Dart_Null(), DartDebuggerObject::Object, "backtrace", false);
+
+        intptr_t localVariablesLength = 0;
+        result = Dart_ListLength(localVariables, &localVariablesLength);
+        ASSERT(!Dart_IsError(result));
+        if (localVariablesLength > 0) {
+            scopeChain->addItem(Scope::create()
+                .setType(Scope::Type::Local)
+                .setObject(wrapDartHandle(localVariables, DartDebuggerObject::LocalVariables, "backtrace", false))
+                .release());
+        }
+
+        if (thisHandle) {
+            scopeChain->addItem(Scope::create()
+                .setType(Scope::Type::Instance)
+                .setObject(thisObject)
+                .release());
+        }
+
+        if (Dart_IsType(enclosingType)) {
+            scopeChain->addItem(Scope::create()
+                .setType(Scope::Type::Class)
+                .setObject(wrapDartHandle(enclosingType, DartDebuggerObject::StaticClass, "backtrace", false))
+                .release());
+        }
+
+        Dart_Handle library = Dart_GetLibraryFromId(location.library_id);
+        ASSERT(Dart_IsLibrary(library));
+        ASSERT(!Dart_IsNull(library));
+        if (Dart_IsLibrary(library)) {
+            scopeChain->addItem(Scope::create()
+                .setType(Scope::Type::Library)
+                .setObject(wrapDartHandle(library, DartDebuggerObject::CurrentLibrary, "backtrace", false))
+                .release());
+        }
+
+        scopeChain->addItem(Scope::create()
+            .setType(Scope::Type::Isolate)
+            .setObject(wrapDartHandle(libraries, DartDebuggerObject::Isolate, "backtrace", false))
+            .release());
+
+        ret->addItem(CallFrame::create()
+            .setCallFrameId(getCallFrameId(i, asyncOrdinal))
+            .setFunctionName(DartUtilities::toString(functionName))
+            .setLocation(locationJson)
+            .setScopeChain(scopeChain)
+            .setThis(thisObject)
+            .release());
+    }
+    return ret;
+}
+
+DartDebuggerObject::Kind DartInjectedScript::inferKind(Dart_Handle handle)
+{
+    DartDOMData* domData = DartDOMData::current();
+    ASSERT(domData);
+    if (Dart_IsType(handle))
+        return DartDebuggerObject::Class;
+    if (Dart_IsError(handle))
+        return DartDebuggerObject::Error;
+    if (Dart_IsNull(handle))
+        return DartDebuggerObject::Object;
+    if (DartUtilities::isFunction(domData, handle))
+        return DartDebuggerObject::Function;
+    if (Dart_IsInstance(handle))
+        return DartDebuggerObject::Object;
+    ASSERT(Dart_IsLibrary(handle));
+    return DartDebuggerObject::Library;
+}
+
+PassRefPtr<TypeBuilder::Runtime::RemoteObject> DartInjectedScript::wrapDartObject(Dart_Handle dartHandle, const String& groupName, bool generatePreview)
+{
+    return wrapDartHandle(dartHandle, inferKind(dartHandle), groupName, generatePreview);
+}
+
+PassRefPtr<TypeBuilder::Runtime::RemoteObject> DartInjectedScript::wrapDartHandle(Dart_Handle dartHandle, DartDebuggerObject::Kind kind, const String& groupName, bool generatePreview)
+{
+    RefPtr<TypeBuilder::Runtime::RemoteObject> remoteObject;
+    packageResult(dartHandle, kind, groupName, 0, false, generatePreview, &remoteObject, 0);
+    return remoteObject;
+}
+
+PassRefPtr<TypeBuilder::Runtime::RemoteObject> DartInjectedScript::wrapObject(const ScriptValue& value, const String& groupName, bool generatePreview)
+{
+    if (!m_scriptState)
+        return nullptr;
+
+    AbstractScriptValue* scriptValue = value.scriptValue();
+    if (scriptValue->isEmpty())
+        return wrapDartObject(Dart_Null(), groupName, generatePreview);
+
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+    ASSERT(!scriptValue->isV8());
+    if (scriptValue->isV8()) {
+        return wrapDartObject(Dart_NewStringFromCString("JavaScript value when Dart value expected"), groupName, generatePreview);
+    }
+    return wrapDartObject(static_cast<DartScriptValue*>(scriptValue)->dartValue(), groupName, generatePreview);
+}
+
+PassRefPtr<TypeBuilder::Runtime::RemoteObject> DartInjectedScript::wrapTable(const ScriptValue& table, const ScriptValue& columns)
+{
+    if (!m_scriptState)
+        return nullptr;
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+    // FIXME: implement this rarely used method or call out to the JS version.
+    ASSERT_NOT_REACHED();
+    return nullptr;
+}
+
+ScriptValue DartInjectedScript::findObjectById(const String& objectId) const
+{
+    // FIXMEDART: Implement this.
+    RELEASE_ASSERT(0);
+    return ScriptValue();
+}
+
+void DartInjectedScript::inspectNode(Node* node)
+{
+    // FIXMEDART: Implement this.
+    RELEASE_ASSERT(0);
+}
+
+void DartInjectedScript::releaseObjectGroup(const String& objectGroup)
+{
+    if (!m_scriptState)
+        return;
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+    ObjectGroupMap::iterator it = m_objectGroups.find(objectGroup);
+    if (it != m_objectGroups.end()) {
+        Vector<String>& ids = it->value;
+        for (Vector<String>::iterator it = ids.begin(); it != ids.end(); ++it) {
+            const String& id = *it;
+            DebuggerObjectMap::iterator objectIt = m_objects.find(id);
+            if (objectIt != m_objects.end()) {
+                delete objectIt->value;
+                m_objects.remove(id);
+            }
+        }
+        m_objectGroups.remove(objectGroup);
+    }
+}
+
+DartScriptState* DartInjectedScript::scriptState() const
+{
+    return m_scriptState;
+}
+
+DartDebuggerObject* DartInjectedScript::lookupObject(const String& objectId)
+{
+    ASSERT(validateObjectId(objectId));
+    DebuggerObjectMap::iterator it = m_objects.find(objectId);
+    return it != m_objects.end() ? it->value : 0;
+}
+
+bool DartInjectedScript::isDartObjectId(const String& objectId)
+{
+    RefPtr<JSONValue> parsedObjectId = parseJSON(objectId);
+    if (parsedObjectId && parsedObjectId->type() == JSONValue::TypeObject) {
+        bool isDart = false;
+        bool success = parsedObjectId->asObject()-> getBoolean("isDart", &isDart);
+        return success && isDart;
+    }
+    return false;
+}
+
+} // namespace blink