Ensure that isolated apps use the right cookies for media requests.

content/shell/shell_browser_context.cc

Index: content/shell/shell_browser_context.cc
diff --git a/content/shell/shell_browser_context.cc b/content/shell/shell_browser_context.cc
index e30d75f0dfa0a58101173bb4ece010ad974c7f0b..e57cd9be97883c77c3fc130662a6835f30cdfdda 100644
--- a/content/shell/shell_browser_context.cc
+++ b/content/shell/shell_browser_context.cc
@@ -104,7 +104,13 @@ net::URLRequestContextGetter*
 }
 
 net::URLRequestContextGetter*
-    ShellBrowserContext::GetRequestContextForMedia()  {
+    ShellBrowserContext::GetMediaRequestContext()  {
+  return GetRequestContext();
+}
+
+net::URLRequestContextGetter*
+    ShellBrowserContext::GetMediaRequestContextForRenderProcess(
+        int renderer_child_id)  {
   return GetRequestContext();
 }