Revert of Simplify BrowserContext by removing redundant methods.

headless/lib/browser/headless_browser_context.cc

Index: headless/lib/browser/headless_browser_context.cc
diff --git a/headless/lib/browser/headless_browser_context.cc b/headless/lib/browser/headless_browser_context.cc
index bf1dcb2c31013cb6d2223e384976268ea4b0e5d8..b48f09012e29ebb40e014fb72ea93dc311196b7b 100644
--- a/headless/lib/browser/headless_browser_context.cc
+++ b/headless/lib/browser/headless_browser_context.cc
@@ -93,24 +93,25 @@
   return false;
 }
 
+net::URLRequestContextGetter* HeadlessBrowserContext::GetRequestContext() {
+  return GetDefaultStoragePartition(this)->GetURLRequestContext();
+}
+
 net::URLRequestContextGetter* HeadlessBrowserContext::GetMediaRequestContext() {
-  return content::BrowserContext::GetDefaultStoragePartition(this)->
-      GetURLRequestContext();
+  return GetRequestContext();
 }
 
 net::URLRequestContextGetter*
 HeadlessBrowserContext::GetMediaRequestContextForRenderProcess(
     int renderer_child_id) {
-  return content::BrowserContext::GetDefaultStoragePartition(this)->
-      GetURLRequestContext();
+  return GetRequestContext();
 }
 
 net::URLRequestContextGetter*
 HeadlessBrowserContext::GetMediaRequestContextForStoragePartition(
     const base::FilePath& partition_path,
     bool in_memory) {
-  return content::BrowserContext::GetDefaultStoragePartition(this)->
-      GetURLRequestContext();
+  return GetRequestContext();
 }
 
 content::ResourceContext* HeadlessBrowserContext::GetResourceContext() {