[net/http auth] Split HttpAuthHandler creation from initialization.

net/http/http_auth_handler_digest.h

Index: net/http/http_auth_handler_digest.h
diff --git a/net/http/http_auth_handler_digest.h b/net/http/http_auth_handler_digest.h
index 5621c2a85192d3c85545fba0f93e3e3e54d5131b..4c5052fb3be784e9e3329e6bb4888c7ae8fa8590 100644
--- a/net/http/http_auth_handler_digest.h
+++ b/net/http/http_auth_handler_digest.h
@@ -65,13 +65,14 @@ class NET_EXPORT_PRIVATE HttpAuthHandlerDigest : public HttpAuthHandler {
     // This factory owns the passed in |nonce_generator|.
     void set_nonce_generator(const NonceGenerator* nonce_generator);
 
-    int CreateAuthHandler(const HttpAuthChallengeTokenizer& challenge,
-                          HttpAuth::Target target,
-                          const GURL& origin,
-                          CreateReason reason,
-                          int digest_nonce_count,
-                          const BoundNetLog& net_log,
-                          scoped_ptr<HttpAuthHandler>* handler) override;
+    // HttpAuthHandlerFactory
+    scoped_ptr<HttpAuthHandler> CreateAuthHandlerForScheme(
+        const std::string& scheme) override;
+    scoped_ptr<HttpAuthHandler> CreateAndInitPreemptiveAuthHandler(
+        HttpAuthCache::Entry* cache_entry,
+        const HttpAuthChallengeTokenizer& tokenizer,
+        HttpAuth::Target target,
+        const BoundNetLog& net_log) override;
 
    private:
     scoped_ptr<const NonceGenerator> nonce_generator_;
@@ -79,6 +80,7 @@ class NET_EXPORT_PRIVATE HttpAuthHandlerDigest : public HttpAuthHandler {
 
   HttpAuth::AuthorizationResult HandleAnotherChallenge(
       const HttpAuthChallengeTokenizer& challenge) override;
+  ~HttpAuthHandlerDigest() override;
 
  protected:
   int Init(const HttpAuthChallengeTokenizer& challenge) override;
@@ -120,7 +122,6 @@ class NET_EXPORT_PRIVATE HttpAuthHandlerDigest : public HttpAuthHandler {
   // the handler. The lifetime of the |nonce_generator| must exceed that of this
   // handler.
   HttpAuthHandlerDigest(int nonce_count, const NonceGenerator* nonce_generator);
-  ~HttpAuthHandlerDigest() override;
 
   // Parse the challenge, saving the results into this instance.
   // Returns true on success.