Implement GetBrowsingDataRemoverDelegate() for BrowserContext subclasses

android_webview/browser/aw_browser_context.cc

Index: android_webview/browser/aw_browser_context.cc
diff --git a/android_webview/browser/aw_browser_context.cc b/android_webview/browser/aw_browser_context.cc
index 5117a0772db7622293313ce1ae40a72feed9913e..0fe34b5fa53a087647ad66fe6ac1b601f84d409f 100644
--- a/android_webview/browser/aw_browser_context.cc
+++ b/android_webview/browser/aw_browser_context.cc
@@ -332,6 +332,11 @@ AwBrowserContext::GetBackgroundSyncController() {
   return nullptr;
 }
 
+content::BrowsingDataRemoverDelegate*
+AwBrowserContext::GetBrowsingDataRemoverDelegate() {
+  return nullptr;
+}
+
 net::URLRequestContextGetter* AwBrowserContext::CreateRequestContext(
     content::ProtocolHandlerMap* protocol_handlers,
     content::URLRequestInterceptorScopedVector request_interceptors) {