Enable the translate bubble to be dismissed when user ignores it.

chrome/browser/ui/views/translate/translate_bubble_view.h

Index: chrome/browser/ui/views/translate/translate_bubble_view.h
diff --git a/chrome/browser/ui/views/translate/translate_bubble_view.h b/chrome/browser/ui/views/translate/translate_bubble_view.h
index 6aa224d00c6a7a417fa88b05789d91b507330f7c..1042629d52f2710498ae46a64fb870d59baa5455 100644
--- a/chrome/browser/ui/views/translate/translate_bubble_view.h
+++ b/chrome/browser/ui/views/translate/translate_bubble_view.h
@@ -94,7 +94,7 @@ class TranslateBubbleView : public LocationBarBubbleDelegateView,
   bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
   gfx::Size GetPreferredSize() const override;
 
-  // views::CombboxListener methods.
+  // views::ComboboxListener methods.
   void OnPerformAction(views::Combobox* combobox) override;
 
   // views::LinkListener method.
@@ -126,6 +126,10 @@ class TranslateBubbleView : public LocationBarBubbleDelegateView,
   // Returns the current view state.
   TranslateBubbleModel::ViewState GetViewState() const;
 
+ protected:
+  // LocationBarBubbleDelegateView:
+  void CloseBubble() override;
+
  private:
   enum LinkID {
     LINK_ID_ADVANCED,
@@ -248,6 +252,8 @@ class TranslateBubbleView : public LocationBarBubbleDelegateView,
   // Whether the window is an incognito window.
   const bool is_in_incognito_window_;
 
+  std::unique_ptr<WebContentMouseHandler> mouse_handler_;
+
   DISALLOW_COPY_AND_ASSIGN(TranslateBubbleView);
 };