| Index: src/FileSystemJsObject.cpp | 
| diff --git a/src/FileSystemJsObject.cpp b/src/FileSystemJsObject.cpp | 
| index 62e45d221306fb0dd3bf2a29708d957c8a5241d8..6547f0a9a9c17b38c7b2377a12531772f87301f4 100644 | 
| --- a/src/FileSystemJsObject.cpp | 
| +++ b/src/FileSystemJsObject.cpp | 
| @@ -251,11 +251,12 @@ namespace | 
| AdblockPlus::JsEnginePtr jsEngine = AdblockPlus::JsEngine::FromArguments(arguments); | 
| AdblockPlus::JsValueList converted = jsEngine->ConvertArguments(arguments); | 
|  | 
| +    v8::Isolate* isolate = arguments.GetIsolate(); | 
| if (converted.size() != 2) | 
| -      return v8::ThrowException(v8::String::New( | 
| +      return v8::ThrowException(Utils::ToV8String(isolate, | 
| "_fileSystem.read requires 2 parameters")); | 
| if (!converted[1]->IsFunction()) | 
| -      return v8::ThrowException(v8::String::New( | 
| +      return v8::ThrowException(Utils::ToV8String(isolate, | 
| "Second argument to _fileSystem.read must be a function")); | 
| ReadThread* const readThread = new ReadThread(jsEngine, converted[1], | 
| converted[0]->AsString()); | 
| @@ -268,11 +269,12 @@ namespace | 
| AdblockPlus::JsEnginePtr jsEngine = AdblockPlus::JsEngine::FromArguments(arguments); | 
| AdblockPlus::JsValueList converted = jsEngine->ConvertArguments(arguments); | 
|  | 
| +    v8::Isolate* isolate = arguments.GetIsolate(); | 
| if (converted.size() != 3) | 
| -      return v8::ThrowException(v8::String::New( | 
| +      return v8::ThrowException(Utils::ToV8String(isolate, | 
| "_fileSystem.write requires 3 parameters")); | 
| if (!converted[2]->IsFunction()) | 
| -      return v8::ThrowException(v8::String::New( | 
| +      return v8::ThrowException(Utils::ToV8String(isolate, | 
| "Third argument to _fileSystem.write must be a function")); | 
| WriteThread* const writeThread = new WriteThread(jsEngine, converted[2], | 
| converted[0]->AsString(), converted[1]->AsString()); | 
| @@ -285,11 +287,12 @@ namespace | 
| AdblockPlus::JsEnginePtr jsEngine = AdblockPlus::JsEngine::FromArguments(arguments); | 
| AdblockPlus::JsValueList converted = jsEngine->ConvertArguments(arguments); | 
|  | 
| +    v8::Isolate* isolate = arguments.GetIsolate(); | 
| if (converted.size() != 3) | 
| -      return v8::ThrowException(v8::String::New( | 
| +      return v8::ThrowException(Utils::ToV8String(isolate, | 
| "_fileSystem.move requires 3 parameters")); | 
| if (!converted[2]->IsFunction()) | 
| -      return v8::ThrowException(v8::String::New( | 
| +      return v8::ThrowException(Utils::ToV8String(isolate, | 
| "Third argument to _fileSystem.move must be a function")); | 
| MoveThread* const moveThread = new MoveThread(jsEngine, converted[2], | 
| converted[0]->AsString(), converted[1]->AsString()); | 
| @@ -302,11 +305,12 @@ namespace | 
| AdblockPlus::JsEnginePtr jsEngine = AdblockPlus::JsEngine::FromArguments(arguments); | 
| AdblockPlus::JsValueList converted = jsEngine->ConvertArguments(arguments); | 
|  | 
| +    v8::Isolate* isolate = arguments.GetIsolate(); | 
| if (converted.size() != 2) | 
| -      return v8::ThrowException(v8::String::New( | 
| +      return v8::ThrowException(Utils::ToV8String(isolate, | 
| "_fileSystem.remove requires 2 parameters")); | 
| if (!converted[1]->IsFunction()) | 
| -      return v8::ThrowException(v8::String::New( | 
| +      return v8::ThrowException(Utils::ToV8String(isolate, | 
| "Second argument to _fileSystem.remove must be a function")); | 
| RemoveThread* const removeThread = new RemoveThread(jsEngine, converted[1], | 
| converted[0]->AsString()); | 
| @@ -319,11 +323,12 @@ namespace | 
| AdblockPlus::JsEnginePtr jsEngine = AdblockPlus::JsEngine::FromArguments(arguments); | 
| AdblockPlus::JsValueList converted = jsEngine->ConvertArguments(arguments); | 
|  | 
| +    v8::Isolate* isolate = arguments.GetIsolate(); | 
| if (converted.size() != 2) | 
| -      return v8::ThrowException(v8::String::New( | 
| +      return v8::ThrowException(Utils::ToV8String(isolate, | 
| "_fileSystem.stat requires 2 parameters")); | 
| if (!converted[1]->IsFunction()) | 
| -      return v8::ThrowException(v8::String::New( | 
| +      return v8::ThrowException(Utils::ToV8String(isolate, | 
| "Second argument to _fileSystem.stat must be a function")); | 
| StatThread* const statThread = new StatThread(jsEngine, converted[1], | 
| converted[0]->AsString()); | 
| @@ -336,13 +341,14 @@ namespace | 
| AdblockPlus::JsEnginePtr jsEngine = AdblockPlus::JsEngine::FromArguments(arguments); | 
| AdblockPlus::JsValueList converted = jsEngine->ConvertArguments(arguments); | 
|  | 
| +    v8::Isolate* isolate = arguments.GetIsolate(); | 
| if (converted.size() != 1) | 
| -      return v8::ThrowException(v8::String::New( | 
| +      return v8::ThrowException(Utils::ToV8String(isolate, | 
| "_fileSystem.resolve requires 1 parameter")); | 
|  | 
| std::string resolved = jsEngine->GetFileSystem()->Resolve(converted[0]->AsString()); | 
|  | 
| -    return Utils::ToV8String(resolved); | 
| +    return Utils::ToV8String(isolate, resolved); | 
| } | 
|  | 
| } | 
|  |