extensions: Use V8 Maybe APIs in NativeHandler

extensions/renderer/v8_helpers.h

Index: extensions/renderer/v8_helpers.h
diff --git a/extensions/renderer/v8_helpers.h b/extensions/renderer/v8_helpers.h
index 385490f4829c1cf33b5d8f9fa812a68aa5d3afe1..77e2eb8de3f0ff9721b9a84c9a5c349d9e91181a 100644
--- a/extensions/renderer/v8_helpers.h
+++ b/extensions/renderer/v8_helpers.h
@@ -22,6 +22,12 @@ inline bool ToV8String(v8::Isolate* isolate,
       .ToLocal(out);
 }
 
+inline bool ToV8String(v8::Isolate* isolate,
+                       const std::string& str,
+                       v8::Local<v8::String>* out) {
+  return ToV8String(isolate, str.c_str(), out);
+}
+
 // Converts |str| to a V8 string.
 // This crashes when strlen(str) > v8::String::kMaxLength.
 inline v8::Local<v8::String> ToV8StringUnsafe(
@@ -100,6 +106,16 @@ inline v8::Local<v8::Value> GetPropertyUnsafe(
       .ToLocalChecked();
 }
 
+// Wraps v8::Function::Call(). Returns true on success.
+inline bool CallFunction(v8::Local<v8::Context> context,
+                         v8::Local<v8::Function> function,
+                         v8::Local<v8::Value> recv,
+                         int argc,
+                         v8::Local<v8::Value> argv[],
+                         v8::Local<v8::Value>* out) {
+  return function->Call(context, recv, argc, argv).ToLocal(out);
+}
+
 }  // namespace v8_helpers
 }  // namespace extensions