Add a feature which, when enabled, blocks permissions after X prompt dismissals.

chrome/browser/permissions/permission_context_base.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/permissions/permission_context_base.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/logging.h"
@@ skipping 18 matching lines @@
 #if defined(OS_ANDROID)
 #include "chrome/browser/permissions/permission_queue_controller.h"
 #else
 #include "chrome/browser/permissions/permission_request_impl.h"
 #include "chrome/browser/permissions/permission_request_manager.h"
 #endif
 
 // static
 const char PermissionContextBase::kPermissionsKillSwitchFieldStudy[] =
     "PermissionsKillSwitch";
-// static
 const char PermissionContextBase::kPermissionsKillSwitchBlockedValue[] =
     "blocked";
+base::LazyInstance<PermissionPromptDecisionLog>
+    PermissionContextBase::prompt_decision_log_ = LAZY_INSTANCE_INITIALIZER;
 
 PermissionContextBase::PermissionContextBase(
     Profile* profile,
     const content::PermissionType permission_type,
     const ContentSettingsType content_settings_type)
     : profile_(profile),
       permission_type_(permission_type),
       content_settings_type_(content_settings_type),
       weak_factory_(this) {
 #if defined(OS_ANDROID)
@@ skipping 174 matching lines @@
       PermissionUmaUtil::PermissionDenied(permission_type_, gesture_type,
                                           requesting_origin, profile_);
     }
   } else {
     DCHECK_EQ(content_setting, CONTENT_SETTING_DEFAULT);
     PermissionUmaUtil::PermissionDismissed(permission_type_, gesture_type,
                                            requesting_origin, profile_);
   }
 #endif
 
+  // Check if we should convert a dismiss decision into a block decision. This
+  // is gated on enabling the kBlockPromptsIfDismissedOften feature.
+  if (!persist &&
+      prompt_decision_log_.Get().ShouldChangeDismissalToBlock(
+          profile_, requesting_origin, permission_type_)) {
+    persist = true;
+    content_setting = CONTENT_SETTING_BLOCK;
+  }
+
   NotifyPermissionSet(id, requesting_origin, embedding_origin, callback,
                       persist, content_setting);
 }
 
 #if defined(OS_ANDROID)
 PermissionQueueController* PermissionContextBase::GetQueueController() {
   return permission_queue_controller_.get();
 }
 #endif
 
@@ skipping 46 matching lines @@
                                       content_setting);
 }
 
 bool PermissionContextBase::IsPermissionKillSwitchOn() const {
   const std::string param = variations::GetVariationParamValue(
       kPermissionsKillSwitchFieldStudy,
       PermissionUtil::GetPermissionString(permission_type_));
 
   return param == kPermissionsKillSwitchBlockedValue;
 }