Change the TranslateDeclined() to only count decline if the explicit_closed is set to true

components/translate/core/browser/translate_ui_delegate.h

Index: components/translate/core/browser/translate_ui_delegate.h
diff --git a/components/translate/core/browser/translate_ui_delegate.h b/components/translate/core/browser/translate_ui_delegate.h
index 82a4bc9bef20c5362ca2bf75e28f7ac227afb670..33ee3293374351ac5d12cbb14664bd16dc352362 100644
--- a/components/translate/core/browser/translate_ui_delegate.h
+++ b/components/translate/core/browser/translate_ui_delegate.h
@@ -88,6 +88,15 @@ class TranslateUIDelegate {
   void RevertTranslation();
 
   // Processes when the user declines translation.
+  // The function name is not accurate. It only means the user did not take
+  // affirmative action after the translation ui show up. The user either
+  // actively decline the translation or ignore the prompt of translation.
+  //   Pass |explicitly_closed| as true if user explicityly decline the
+  //     translation.
+  //   Pass |explicitly_closed| as false if the translation UI is dismissed
+  //     implicit by some user actions which ignore the translation UI,
+  //     such as switch to a new tab/window or navigate to another page by
+  //     click a link.
   void TranslationDeclined(bool explicitly_closed);
 
   // Returns true if the current language is blocked.