[Translate] Expose whether the user is within a navigation session as part of the infobar delegate

chrome/browser/translate/translate_infobar_delegate.cc

Index: chrome/browser/translate/translate_infobar_delegate.cc
diff --git a/chrome/browser/translate/translate_infobar_delegate.cc b/chrome/browser/translate/translate_infobar_delegate.cc
index b09a7cb2dc2b294005019f09a10fd4786ffe4da3..01502ffb25b829dd62945ece8fe23161d3d8c839 100644
--- a/chrome/browser/translate/translate_infobar_delegate.cc
+++ b/chrome/browser/translate/translate_infobar_delegate.cc
@@ -113,6 +113,14 @@ void TranslateInfoBarDelegate::TranslationDeclined() {
   UMA_HISTOGRAM_COUNTS("Translate.DeclineTranslate", 1);
 }
 
+bool TranslateInfoBarDelegate::InTranslateNavigation() {
+  TranslateTabHelper* translate_tab_helper =
+      TranslateTabHelper::FromWebContents(web_contents());
+  if (!translate_tab_helper)
+    return false;
+  return translate_tab_helper->language_state().InTranslateNavigation();
+}
+
 bool TranslateInfoBarDelegate::IsLanguageBlacklisted() {
   return prefs_.IsLanguageBlacklisted(original_language_code());
 }