Simplify BrowserContext by removing redundant methods.

extensions/browser/api/socket/socket_api.cc

Index: extensions/browser/api/socket/socket_api.cc
diff --git a/extensions/browser/api/socket/socket_api.cc b/extensions/browser/api/socket/socket_api.cc
index 4b1074a0085dd29898f9cf4fe6bfa26364e4dc0f..4039f6de4c2d7f6b012ba0c521f58ab44a73e584 100644
--- a/extensions/browser/api/socket/socket_api.cc
+++ b/extensions/browser/api/socket/socket_api.cc
@@ -12,6 +12,7 @@
 #include "build/build_config.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/resource_context.h"
+#include "content/public/browser/storage_partition.h"
 #include "extensions/browser/api/dns/host_resolver_wrapper.h"
 #include "extensions/browser/api/socket/socket.h"
 #include "extensions/browser/api/socket/tcp_socket.h"
@@ -1010,7 +1011,8 @@ bool SocketSecureFunction::Prepare() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   params_ = api::socket::Secure::Params::Create(*args_);
   EXTENSION_FUNCTION_VALIDATE(params_.get());
-  url_request_getter_ = browser_context()->GetRequestContext();
+  url_request_getter_ = content::BrowserContext::GetDefaultStoragePartition(
+      browser_context())->GetURLRequestContext();
   return true;
 }