log the click activate/deactive of translate icon on location bar

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 d99bcf7d26a6009b3bf8b32ce10010d2d63118ee..834632156f59319b38e3e7b7b033db9c1d9d22f2 100644
--- a/chrome/browser/ui/translate/translate_bubble_view_state_transition.h
+++ b/chrome/browser/ui/translate/translate_bubble_view_state_transition.h
@@ -62,9 +62,17 @@ enum TranslateBubbleUiEvent {
   // The user changed the "Target language".
   TARGET_LANGUAGE_MENU_CLICKED,
 
+  // The user activated the translate page action icon.
+  PAGE_ACTION_ICON_ACTIVATED,
+
+  // The user deactivated the translate page action icon.
+  PAGE_ACTION_ICON_DEACTIVATED,
+
   TRANSLATE_BUBBLE_UI_EVENT_MAX
 };
 
+extern const char kTranslateBubbleUIEvent[];
+
 }  // namespace translate
 
 // The class which manages the transition of the view state of the Translate