Ensure settings returned from Content Settings providers are valid

chrome/browser/content_settings/content_settings_internal_extension_provider.cc

Index: chrome/browser/content_settings/content_settings_internal_extension_provider.cc
diff --git a/chrome/browser/content_settings/content_settings_internal_extension_provider.cc b/chrome/browser/content_settings/content_settings_internal_extension_provider.cc
index bd58d07a74e21307b9b981047334aed280c616fc..ddea53c6c7e8c6af67c99857bf7c8079d838f277 100644
--- a/chrome/browser/content_settings/content_settings_internal_extension_provider.cc
+++ b/chrome/browser/content_settings/content_settings_internal_extension_provider.cc
@@ -10,6 +10,8 @@
 #include "chrome/browser/pdf/pdf_extension_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_content_client.h"
+#include "components/content_settings/core/browser/content_settings_info.h"
+#include "components/content_settings/core/browser/content_settings_registry.h"
 #include "components/content_settings/core/browser/content_settings_rule.h"
 #include "components/content_settings/core/common/content_settings.h"
 #include "components/content_settings/core/common/content_settings_pattern.h"
@@ -211,6 +213,9 @@ void InternalExtensionProvider::SetContentSettingForExtensionAndResource(
                              CONTENT_SETTINGS_TYPE_PLUGINS,
                              resource);
     } else {
+      DCHECK(content_settings::ContentSettingsRegistry::GetInstance()
+                 ->Get(CONTENT_SETTINGS_TYPE_PLUGINS)
+                 ->IsSettingValid(setting));
       value_map_.SetValue(primary_pattern, secondary_pattern,
                           CONTENT_SETTINGS_TYPE_PLUGINS, resource,
                           new base::Value(setting));