[inspector] added exception CHECKs before ConsoleCall

R=jgruber@chromium.org

Bug: chromium:752019
Change-Id: I9911b2d3cd65f41e0d1b94af05c9222f9a4f9ba8
Reviewed-on: https://chromium-review.googlesource.com/611618Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47477}

src/builtins/builtins-console.cc

@@ -44,8 +44,10 @@ void ConsoleCall(
     Isolate* isolate, internal::BuiltinArguments& args,
     void (debug::ConsoleDelegate::*func)(const v8::debug::ConsoleCallArguments&,
                                          const v8::debug::ConsoleContext&)) {
-  HandleScope scope(isolate);
+  CHECK(!isolate->has_pending_exception());
+  CHECK(!isolate->has_scheduled_exception());
   if (!isolate->console_delegate()) return;
+  HandleScope scope(isolate);
   debug::ConsoleCallArguments wrapper(args);
   Handle<Object> context_id_obj = JSObject::GetDataProperty(
       args.target(), isolate->factory()->console_context_id_symbol());