Revert of Simplify BrowserContext by removing redundant methods.

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 2ba1249306d0db1babbcac900a6afeee5335594c..bba02becc1c66346c1e3e9515bfeacaf685b0904 100644
--- a/chromecast/browser/cast_browser_context.cc
+++ b/chromecast/browser/cast_browser_context.cc
@@ -94,6 +94,10 @@
   return false;
 }
 
+net::URLRequestContextGetter* CastBrowserContext::GetRequestContext() {
+  return GetDefaultStoragePartition(this)->GetURLRequestContext();
+}
+
 net::URLRequestContextGetter* CastBrowserContext::GetMediaRequestContext() {
   return url_request_context_factory_->GetMediaGetter();
 }