Http cache: Remove deprecated code.

net/http/http_cache.h

Index: net/http/http_cache.h
===================================================================
--- net/http/http_cache.h	(revision 49439)
+++ net/http/http_cache.h	(working copy)
@@ -135,12 +135,6 @@
 
   HttpTransactionFactory* network_layer() { return network_layer_.get(); }
 
-  // Returns the cache backend for this HttpCache instance. If the backend
-  // is not initialized yet, this method will initialize it. If the return
-  // value is NULL then the backend cannot be initialized.
-  // This method is deprecated.
-  disk_cache::Backend* GetBackend();
-
   // Retrieves the cache backend for this HttpCache instance. If the backend
   // is not initialized yet, this method will initialize it. The return value is
   // a network error code, and it could be ERR_IO_PENDING, in which case the
@@ -157,21 +151,6 @@
   virtual HttpNetworkSession* GetSession();
   virtual void Suspend(bool suspend);
 
-  // Helper function for reading response info from the disk cache.  If the
-  // cache doesn't have the whole resource *|request_truncated| is set to true.
-  // NOTE: This method is deprecated.
-  static bool ReadResponseInfo(disk_cache::Entry* disk_entry,
-                               HttpResponseInfo* response_info,
-                               bool* response_truncated);
-
-  // Helper function for writing response info into the disk cache.  If the
-  // cache doesn't have the whole resource |request_truncated| should be true.
-  // NOTE: This method is deprecated.
-  static bool WriteResponseInfo(disk_cache::Entry* disk_entry,
-                                const HttpResponseInfo* response_info,
-                                bool skip_transient_headers,
-                                bool response_truncated);
-
   // Given a header data blob, convert it to a response info object.
   static bool ParseResponseInfo(const char* data, int len,
                                 HttpResponseInfo* response_info,