[Translate] Integrate TranslateEventProto UMA logging into TranslateManager.

chrome/browser/ui/translate/translate_bubble_view_state_transition.h

Index: chrome/browser/ui/translate/translate_bubble_view_state_transition.h
diff --git a/chrome/browser/ui/translate/translate_bubble_view_state_transition.h b/chrome/browser/ui/translate/translate_bubble_view_state_transition.h
index f9f73e81a59de3ec8c10f98317ee620570cebdc9..ee231fa430269e37ae6f98208eb5793f40bbf2f8 100644
--- a/chrome/browser/ui/translate/translate_bubble_view_state_transition.h
+++ b/chrome/browser/ui/translate/translate_bubble_view_state_transition.h
@@ -72,6 +72,13 @@ enum TranslateBubbleUiEvent {
   // The translate bubble was shown to the user.
   BUBBLE_SHOWN,
 
+  // The translate bugbble could not be shown to the user, for various reasons.
+  BUBBLE_NOT_SHOWN_WINDOW_NOT_VALID,
+  BUBBLE_NOT_SHOWN_WINDOW_MINIMIZED,
+  BUBBLE_NOT_SHOWN_WINDOW_NOT_ACTIVE,
+  BUBBLE_NOT_SHOWN_WEB_CONTENTS_NOT_ACTIVE,
+  BUBBLE_NOT_SHOWN_EDITABLE_FIELD_IS_ACTIVE,
+
   TRANSLATE_BUBBLE_UI_EVENT_MAX
 };