Focus first invalid field of payment request editor

chrome/browser/ui/views/payments/validating_textfield.cc

Index: chrome/browser/ui/views/payments/validating_textfield.cc
diff --git a/chrome/browser/ui/views/payments/validating_textfield.cc b/chrome/browser/ui/views/payments/validating_textfield.cc
index 0f5204c4c5cceb328b57a76bb59f360f21d0e4ee..fe3d02d22062309f6ae8205ee86349fdf68d66d0 100644
--- a/chrome/browser/ui/views/payments/validating_textfield.cc
+++ b/chrome/browser/ui/views/payments/validating_textfield.cc
@@ -41,9 +41,15 @@ void ValidatingTextfield::OnContentsChanged() {
   Validate();
 }
 
+bool ValidatingTextfield::IsValid() {
+  bool valid = delegate_->IsValidTextfield(this);
+  SetInvalid(!valid);
+  return valid;
+}
+
 void ValidatingTextfield::Validate() {
-  // ValidateTextfield may have side-effects, such as displaying errors.
-  SetInvalid(!delegate_->ValidateTextfield(this));
+  // TextfieldValueChanged may have side-effects, such as displaying errors.
+  SetInvalid(!delegate_->TextfieldValueChanged(this));
 }
 
 }  // namespace payments