chrome/browser/android/hung_renderer_infobar_delegate.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_ANDROID_HUNG_RENDERER_INFOBAR_DELEGATE_H_
   6 #define CHROME_BROWSER_ANDROID_HUNG_RENDERER_INFOBAR_DELEGATE_H_
   7
   8 #include "components/infobars/core/confirm_infobar_delegate.h"
   9
  10 namespace content {
  11 class RenderProcessHost;
  12 }
  13
  14 class InfoBarService;
  15
  16 // A hung renderer infobar is shown when the when the renderer is deemed
  17 // unresponsive. The infobar provides the user with a choice of either
  18 // waiting for the renderer to regain responsiveness, or killing the
  19 // renderer immediately. This class provides the resources necessary to
  20 // display such an infobar, also logging the action taken by the user
  21 // (if any) for UMA purposes.
  22 class HungRendererInfoBarDelegate : public ConfirmInfoBarDelegate {
  23  public:
  24   // Creates a hung renderer InfoBar, adding it to the provided
  25   // |infobar_service|. The |render_process_host| will be used to kill the
  26   // renderer process if the user so chooses.
  27   static void Create(InfoBarService* infobar_service,
  28                      content::RenderProcessHost* render_process_host);
  29
  30   // Called if the renderer regains responsiveness before the infobar is
  31   // dismissed.
  32   void OnRendererResponsive();
  33
  34  private:
  35   // Keep these values in alignment with their histograms.xml counterparts.
  36   enum Event {
  37     WAIT_CLICKED = 0,
  38     KILL_CLICKED,
  39     CLOSE_CLICKED,
  40     RENDERER_BECAME_RESPONSIVE,
  41     TAB_CLOSED,
  42     EVENT_COUNT
  43   };
  44
  45   explicit HungRendererInfoBarDelegate(
  46       content::RenderProcessHost* render_process_host);
  47   ~HungRendererInfoBarDelegate() override;
  48
  49   // ConfirmInfoBarDelegate:
  50   void InfoBarDismissed() override;
  51   HungRendererInfoBarDelegate* AsHungRendererInfoBarDelegate() override;
  52   int GetIconId() const override;
  53   base::string16 GetMessageText() const override;
  54   base::string16 GetButtonLabel(InfoBarButton button) const override;
  55   bool Accept() override;
  56   bool Cancel() override;
  57
  58   void LogEvent(Event event);
  59
  60   // Used to terminate the renderer process if the user clicks the kill button.
  61   content::RenderProcessHost* render_process_host_;
  62
  63   bool terminal_event_logged_for_uma_;
  64
  65   DISALLOW_COPY_AND_ASSIGN(HungRendererInfoBarDelegate);
  66 };
  67
  68 #endif  // CHROME_BROWSER_ANDROID_HUNG_RENDERER_INFOBAR_DELEGATE_H_