Automatically trigger Always-Translate in new translation infobar

components/translate/core/browser/translate_infobar_delegate.cc

Index: components/translate/core/browser/translate_infobar_delegate.cc
diff --git a/components/translate/core/browser/translate_infobar_delegate.cc b/components/translate/core/browser/translate_infobar_delegate.cc
index 5fa42a5c705c0dbf1ac90aca3eba30477184e3d5..f6008521dd3d7ef0304ace07617ef6ef483f1ccd 100644
--- a/components/translate/core/browser/translate_infobar_delegate.cc
+++ b/components/translate/core/browser/translate_infobar_delegate.cc
@@ -46,6 +46,10 @@ const int kAlwaysTranslateMinCount = 3;
 const int kNeverTranslateMinCount = 3;
 #endif
 
+// For Compact UI, if number of consecutive translations is equal to this
+// number, infobar will automatically trigger "Always Translate".
+const int kAcceptCountThreshold = 5;
+
 }  // namespace
 
 const base::Feature kTranslateCompactUI{"TranslateCompactUI",
@@ -298,6 +302,12 @@ void TranslateInfoBarDelegate::ShowNeverTranslateInfobar() {
 }
 #endif
 
+bool TranslateInfoBarDelegate::ShouldAutoAlwaysTranslate() {
+  return (IsCompactUIEnabled() &&
+          prefs_->GetTranslationAcceptedCount(original_language_code()) ==
+              kAcceptCountThreshold);
+}
+
 // static
 void TranslateInfoBarDelegate::GetAfterTranslateStrings(
     std::vector<base::string16>* strings,
@@ -378,7 +388,8 @@ int TranslateInfoBarDelegate::GetIconId() const {
 void TranslateInfoBarDelegate::InfoBarDismissed() {
   if (step_ != translate::TRANSLATE_STEP_BEFORE_TRANSLATE)
     return;
-
+  if (IsCompactUIEnabled())
+    return;
   // The user closed the infobar without clicking the translate button.
   TranslationDeclined();
   UMA_HISTOGRAM_BOOLEAN("Translate.DeclineTranslateCloseInfobar", true);