Convert most of extensions and some other random stuff to using the base namespace for Values.

chrome/browser/content_settings/content_settings_provider.h

Index: chrome/browser/content_settings/content_settings_provider.h
diff --git a/chrome/browser/content_settings/content_settings_provider.h b/chrome/browser/content_settings/content_settings_provider.h
index 6bc64de365df3cee8311a9b7b31242018ed6717c..c75aca09444a6ce6bf6d667d413aef9189b4607c 100644
--- a/chrome/browser/content_settings/content_settings_provider.h
+++ b/chrome/browser/content_settings/content_settings_provider.h
@@ -54,7 +54,7 @@ class ProviderInterface {
       const ContentSettingsPattern& secondary_pattern,
       ContentSettingsType content_type,
       const ResourceIdentifier& resource_identifier,
-      Value* value) = 0;
+      base::Value* value) = 0;
 
   // Resets all content settings for the given |content_type| and empty resource
   // identifier to CONTENT_SETTING_DEFAULT.