Revert of Simplify BrowserContext by removing redundant methods.

content/shell/browser/shell_access_token_store.cc

Index: content/shell/browser/shell_access_token_store.cc
diff --git a/content/shell/browser/shell_access_token_store.cc b/content/shell/browser/shell_access_token_store.cc
index 4945e7c8276c878bb5e7efb40f641419d158eab1..956ae1a4eea3a3dcf977d01b47817fc35e58b00b 100644
--- a/content/shell/browser/shell_access_token_store.cc
+++ b/content/shell/browser/shell_access_token_store.cc
@@ -8,7 +8,6 @@
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/browser/browser_thread.h"
-#include "content/public/browser/storage_partition.h"
 #include "content/shell/browser/shell_browser_context.h"
 
 namespace content {
@@ -37,9 +36,7 @@
 
 void ShellAccessTokenStore::GetRequestContextOnUIThread(
     content::ShellBrowserContext* shell_browser_context) {
-  system_request_context_ =
-      BrowserContext::GetDefaultStoragePartition(shell_browser_context)->
-          GetURLRequestContext();
+  system_request_context_ = shell_browser_context->GetRequestContext();
 }
 
 void ShellAccessTokenStore::RespondOnOriginatingThread(