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

chrome/test/base/testing_profile.cc

Index: chrome/test/base/testing_profile.cc
diff --git a/chrome/test/base/testing_profile.cc b/chrome/test/base/testing_profile.cc
index eabf2e3f2753ad150c64406257edcb109eb2ba7f..10586d9b47d75fc72169b4db17616ac2ee0e1f82 100644
--- a/chrome/test/base/testing_profile.cc
+++ b/chrome/test/base/testing_profile.cc
@@ -631,7 +631,13 @@ void TestingProfile::ResetRequestContext() {
   request_context_ = NULL;
 }
 
-net::URLRequestContextGetter* TestingProfile::GetRequestContextForMedia() {
+net::URLRequestContextGetter*
+TestingProfile::GetDefaultRequestContextForMedia() {
+  return NULL;
+}
+
+net::URLRequestContextGetter* TestingProfile::GetRequestContextForMedia(
+    int renderer_child_id) {
   return NULL;
 }