Revert of Simplify BrowserContext by removing redundant methods.

content/shell/browser/shell_browser_context.cc

Index: content/shell/browser/shell_browser_context.cc
diff --git a/content/shell/browser/shell_browser_context.cc b/content/shell/browser/shell_browser_context.cc
index 40b906a9ca13600fe2da599d38212c31ec8fb18d..505729904fe4a4020f52657698f0d3ad70376ef7 100644
--- a/content/shell/browser/shell_browser_context.cc
+++ b/content/shell/browser/shell_browser_context.cc
@@ -125,6 +125,10 @@
   return download_manager_delegate_.get();
 }
 
+net::URLRequestContextGetter* ShellBrowserContext::GetRequestContext()  {
+  return GetDefaultStoragePartition(this)->GetURLRequestContext();
+}
+
 ShellURLRequestContextGetter*
 ShellBrowserContext::CreateURLRequestContextGetter(
     ProtocolHandlerMap* protocol_handlers,
@@ -148,23 +152,20 @@
 
 net::URLRequestContextGetter*
     ShellBrowserContext::GetMediaRequestContext()  {
-  return BrowserContext::GetDefaultStoragePartition(this)->
-      GetURLRequestContext();
+  return GetRequestContext();
 }
 
 net::URLRequestContextGetter*
     ShellBrowserContext::GetMediaRequestContextForRenderProcess(
         int renderer_child_id)  {
-  return BrowserContext::GetDefaultStoragePartition(this)->
-      GetURLRequestContext();
+  return GetRequestContext();
 }
 
 net::URLRequestContextGetter*
     ShellBrowserContext::GetMediaRequestContextForStoragePartition(
         const base::FilePath& partition_path,
         bool in_memory) {
-  return BrowserContext::GetDefaultStoragePartition(this)->
-      GetURLRequestContext();
+  return GetRequestContext();
 }
 
 net::URLRequestContextGetter*