Use V8 Maybe APIs in extensions/renderer

extensions/renderer/api_activity_logger.cc

Index: extensions/renderer/api_activity_logger.cc
diff --git a/extensions/renderer/api_activity_logger.cc b/extensions/renderer/api_activity_logger.cc
index 826abb0c89daee41eecd0261a1a62fd68d8ecafb..f0964f377c446e8fca7f16ab87ab92b6ea527e16 100644
--- a/extensions/renderer/api_activity_logger.cc
+++ b/extensions/renderer/api_activity_logger.cc
@@ -59,11 +59,12 @@ void APIActivityLogger::LogInternal(
     converter->SetFunctionAllowed(true);
     converter->SetStrategy(&strategy);
     scoped_ptr<base::ListValue> arg_list(new base::ListValue());
-    for (size_t i = 0; i < arg_array->Length(); ++i) {
-      arg_list->Set(
-          i,
-          converter->FromV8Value(arg_array->Get(i),
-                                 args.GetIsolate()->GetCurrentContext()));
+    v8::Local<v8::Context> context = args.GetIsolate()->GetCurrentContext();
+    for (uint32_t i = 0; i < arg_array->Length(); ++i) {
+      v8::Local<v8::Value> property;
+      if (!arg_array->Get(context, i).ToLocal(&property))
+        return;
+      arg_list->Set(i, converter->FromV8Value(property, context));
     }
     params.arguments.Swap(arg_list.get());
   }