Bring the feedback button to the Mac sad tab

chrome/browser/ui/views/sad_tab_view.h

Index: chrome/browser/ui/views/sad_tab_view.h
diff --git a/chrome/browser/ui/views/sad_tab_view.h b/chrome/browser/ui/views/sad_tab_view.h
index f5d07845053d22cb5db156b75191663e0d26d057..2c18287ad06a9ef1d489c5efc89e3de4e4084baa 100644
--- a/chrome/browser/ui/views/sad_tab_view.h
+++ b/chrome/browser/ui/views/sad_tab_view.h
@@ -5,8 +5,6 @@
 #ifndef CHROME_BROWSER_UI_VIEWS_SAD_TAB_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_SAD_TAB_VIEW_H_
 
-#include "base/compiler_specific.h"
-#include "base/macros.h"
 #include "chrome/browser/ui/sad_tab.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/link_listener.h"
@@ -36,12 +34,6 @@ class SadTabView : public chrome::SadTab,
                    public views::LinkListener,
                    public views::ButtonListener {
  public:
-  // Tag to denote which type of action button is displayed.
-  enum ButtonTag {
-    SAD_TAB_BUTTON_FEEDBACK,
-    SAD_TAB_BUTTON_RELOAD,
-  };
-
   SadTabView(content::WebContents* web_contents, chrome::SadTabKind kind);
   ~SadTabView() override;
 
@@ -59,24 +51,15 @@ class SadTabView : public chrome::SadTab,
   void OnPaint(gfx::Canvas* canvas) override;
 
  private:
-  // Overridden from chrome::SadTab:
-  void Show() override;
-  void Close() override;
 
   views::Label* CreateLabel(const base::string16& text);
   views::Link* CreateLink(const base::string16& text, const SkColor& color);
 
-  content::WebContents* web_contents_;
-  chrome::SadTabKind kind_;
-  bool painted_;
+  bool painted_ = false;
   views::Label* message_;
   views::Link* help_link_;
   views::LabelButton* action_button_;
   views::Label* title_;
-  views::StyledLabel* help_message_;
-  static int total_crashes_;
-
-  DISALLOW_COPY_AND_ASSIGN(SadTabView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_SAD_TAB_VIEW_H__