Deprecate the StickyDefaultBrowserPrompt experiment

chrome/browser/ui/startup/default_browser_infobar_delegate.h

Index: chrome/browser/ui/startup/default_browser_infobar_delegate.h
diff --git a/chrome/browser/ui/startup/default_browser_infobar_delegate.h b/chrome/browser/ui/startup/default_browser_infobar_delegate.h
index 53e303f655fc6d80533df6163ea784ea7598728f..26a9128a79f0cf5c5825e8688bfe7ff7d206ecc4 100644
--- a/chrome/browser/ui/startup/default_browser_infobar_delegate.h
+++ b/chrome/browser/ui/startup/default_browser_infobar_delegate.h
@@ -5,7 +5,6 @@
 #ifndef CHROME_BROWSER_UI_STARTUP_DEFAULT_BROWSER_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_UI_STARTUP_DEFAULT_BROWSER_INFOBAR_DELEGATE_H_
 
-#include "base/feature_list.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/shell_integration.h"
 #include "components/infobars/core/confirm_infobar_delegate.h"
@@ -14,15 +13,6 @@ class Profile;
 
 namespace chrome {
 
-// The StickyDefaultBrowserPrompt experiment delays the dismissal of the
-// DefaultBrowserPrompt to after a change in the default browser setting has
-// been detected.
-constexpr base::Feature kStickyDefaultBrowserPrompt{
-    "StickyDefaultBrowserPrompt", base::FEATURE_DISABLED_BY_DEFAULT};
-
-// Returns true if the StickyDefaultBrowserPrompt experiment is enabled.
-bool IsStickyDefaultBrowserPromptEnabled();
-
 // The delegate for the infobar shown when Chrome is not the default browser.
 // Ownership of the delegate is given to the infobar itself, the lifetime of
 // which is bound to the containing WebContents.
@@ -65,21 +55,9 @@ class DefaultBrowserInfoBarDelegate : public ConfirmInfoBarDelegate {
   bool OKButtonTriggersUACPrompt() const override;
   bool Accept() override;
 
-  // Declared virtual so tests can override.
-  virtual scoped_refptr<shell_integration::DefaultBrowserWorker>
-  CreateDefaultBrowserWorker(
-      const shell_integration::DefaultWebClientWorkerCallback& callback);
-
-  // Removes the infobar when the worker is finished setting the default
-  // browser. Only used if the StickyDefaultBrowserPrompt experiment is
-  // enabled.
-  void OnSetAsDefaultFinished(shell_integration::DefaultWebClientState state);
-
   // The WebContents's corresponding profile.
   Profile* profile_;
 
-  scoped_refptr<base::SingleThreadTaskRunner> thread_task_runner_;
-
   // Whether the info bar should be dismissed on the next navigation.
   bool should_expire_;