Improve testing for SDCH.

net/base/sdch_dictionary_fetcher.h

Index: net/base/sdch_dictionary_fetcher.h
diff --git a/net/base/sdch_dictionary_fetcher.h b/net/base/sdch_dictionary_fetcher.h
index b657b8f80c38900a889e0065a0dd410a1ef6c88b..82c0b10c6e48a19733021be751986ac5990a60b3 100644
--- a/net/base/sdch_dictionary_fetcher.h
+++ b/net/base/sdch_dictionary_fetcher.h
@@ -29,11 +29,11 @@ class NET_EXPORT SdchDictionaryFetcher
       public SdchFetcher,
       public base::NonThreadSafe {
  public:
-  // Consumer must guarantee that the SdchManager pointer outlives
+  // The consumer must guarantee that |*manager| outlives
   // this object.  The current implementation guarantees this by
   // the SdchManager owning this object.
   SdchDictionaryFetcher(SdchManager* manager,
-                        URLRequestContextGetter* context);
+                        scoped_refptr<URLRequestContextGetter> context);
   virtual ~SdchDictionaryFetcher();
 
   // Implementation of SdchFetcher class.