Implement GetBrowsingDataRemoverDelegate() for BrowserContext subclasses

chromecast/browser/cast_browser_context.cc

Index: chromecast/browser/cast_browser_context.cc
diff --git a/chromecast/browser/cast_browser_context.cc b/chromecast/browser/cast_browser_context.cc
index 4e60ac88952c3f9a61f57d6cc238fdec10181ba0..982f9f2c150bb133213555e680fd5bc3eefeee13 100644
--- a/chromecast/browser/cast_browser_context.cc
+++ b/chromecast/browser/cast_browser_context.cc
@@ -135,6 +135,11 @@ CastBrowserContext::GetBackgroundSyncController() {
   return nullptr;
 }
 
+content::BrowsingDataRemoverDelegate*
+CastBrowserContext::GetBrowsingDataRemoverDelegate() {
+  return nullptr;
+}
+
 net::URLRequestContextGetter* CastBrowserContext::CreateRequestContext(
     content::ProtocolHandlerMap* protocol_handlers,
     content::URLRequestInterceptorScopedVector request_interceptors) {