Remove support for the keygen tag

chrome/browser/content_settings/tab_specific_content_settings.cc

Index: chrome/browser/content_settings/tab_specific_content_settings.cc
diff --git a/chrome/browser/content_settings/tab_specific_content_settings.cc b/chrome/browser/content_settings/tab_specific_content_settings.cc
index f843210c27dda758bb97ca0087e721d616341d9c..68c7f857b545681635bea038b28cfbccf5ef7559 100644
--- a/chrome/browser/content_settings/tab_specific_content_settings.cc
+++ b/chrome/browser/content_settings/tab_specific_content_settings.cc
@@ -249,8 +249,7 @@ bool TabSpecificContentSettings::IsContentBlocked(
       content_type == CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA ||
       content_type == CONTENT_SETTINGS_TYPE_PPAPI_BROKER ||
       content_type == CONTENT_SETTINGS_TYPE_AUTOMATIC_DOWNLOADS ||
-      content_type == CONTENT_SETTINGS_TYPE_MIDI_SYSEX ||
-      content_type == CONTENT_SETTINGS_TYPE_KEYGEN) {
+      content_type == CONTENT_SETTINGS_TYPE_MIDI_SYSEX) {
     const auto& it = content_settings_status_.find(content_type);
     if (it != content_settings_status_.end())
       return it->second.blocked;
@@ -540,16 +539,6 @@ void TabSpecificContentSettings::OnGeolocationPermissionSet(
       content::NotificationService::NoDetails());
 }
 
-void TabSpecificContentSettings::OnDidUseKeygen(const GURL& origin_url) {
-  HostContentSettingsMap* map = HostContentSettingsMapFactory::GetForProfile(
-      Profile::FromBrowserContext(web_contents()->GetBrowserContext()));
-  GURL url = web_contents()->GetLastCommittedURL();
-  if (map->GetContentSetting(url, url, CONTENT_SETTINGS_TYPE_KEYGEN,
-                             std::string()) != CONTENT_SETTING_ALLOW) {
-    OnContentBlocked(CONTENT_SETTINGS_TYPE_KEYGEN);
-  }
-}
-
 #if defined(OS_ANDROID) || defined(OS_CHROMEOS)
 void TabSpecificContentSettings::OnProtectedMediaIdentifierPermissionSet(
     const GURL& requesting_origin,
@@ -792,7 +781,6 @@ bool TabSpecificContentSettings::OnMessageReceived(
   IPC_BEGIN_MESSAGE_MAP(TabSpecificContentSettings, message)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_ContentBlocked,
                         OnContentBlockedWithDetail)
-    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_DidUseKeygen, OnDidUseKeygen)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;