[inspector] fixed compilation with gyp

test/inspector/task-runner.cc

Index: test/inspector/task-runner.cc
diff --git a/test/inspector/task-runner.cc b/test/inspector/task-runner.cc
index a92f2d0aadcf7cdb047314028c07cde47560fc48..577ab306c72d5654b32fa0ffbcb00f03455c53de 100644
--- a/test/inspector/task-runner.cc
+++ b/test/inspector/task-runner.cc
@@ -78,9 +78,10 @@ v8::Local<v8::Context> TaskRunner::GetContext(int context_group_id) {
 }
 
 int TaskRunner::GetContextGroupId(v8::Local<v8::Context> context) {
-  return reinterpret_cast<intptr_t>(
-             context->GetAlignedPointerFromEmbedderData(kContextGroupIdIndex)) /
-         2;
+  return static_cast<int>(
+      reinterpret_cast<intptr_t>(
+          context->GetAlignedPointerFromEmbedderData(kContextGroupIdIndex)) /
+      2);
 }
 
 void TaskRunner::Run() {