Cleanup: Remove unneeded forward declararations in net.

net/http/http_cache_transaction.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file declares HttpCache::Transaction, a private class of HttpCache so
 // it should only be included by http_cache.cc
 
 #ifndef NET_HTTP_HTTP_CACHE_TRANSACTION_H_
 #define NET_HTTP_HTTP_CACHE_TRANSACTION_H_
 #pragma once
 
 #include <string>
 
 #include "base/time.h"
 #include "net/base/net_log.h"
 #include "net/http/http_cache.h"
 #include "net/http/http_response_info.h"
 #include "net/http/http_request_headers.h"
 #include "net/http/http_transaction.h"
 
 namespace net {
 
-class HttpResponseHeaders;
 class PartialData;
 struct HttpRequestInfo;
 
 // This is the transaction that is returned by the HttpCache transaction
 // factory.
 class HttpCache::Transaction : public HttpTransaction {
  public:
   // The transaction has the following modes, which apply to how it may access
   // its cache entry.
   //
@@ skipping 16 matching lines @@
   enum Mode {
     NONE            = 0,
     READ_META       = 1 << 0,
     READ_DATA       = 1 << 1,
     READ            = READ_META | READ_DATA,
     WRITE           = 1 << 2,
     READ_WRITE      = READ | WRITE,
     UPDATE          = READ_META | WRITE,  // READ_WRITE & ~READ_DATA
   };
 
-  Transaction(HttpCache* cache);
+  explicit Transaction(HttpCache* cache);
   virtual ~Transaction();
 
   Mode mode() const { return mode_; }
 
   const std::string& key() const { return cache_key_; }
 
   // Writes |buf_len| bytes of meta-data from the provided buffer |buf|. to the
   // HTTP cache entry that backs this transaction (if any).
   // Returns the number of bytes actually written, or a net error code. If the
   // operation cannot complete immediately, returns ERR_IO_PENDING, grabs a
   // reference to the buffer (until completion), and notifies the caller using
   // the provided |callback| when the operatiopn finishes.
   //
   // The first time this method is called for a given transaction, previous
   // meta-data will be overwritten with the provided data, and subsequent
   // invocations will keep appending to the cached entry.
   //
   // In order to guarantee that the metadata is set to the correct entry, the
   // response (or response info) must be evaluated by the caller, for instance
   // to make sure that the response_time is as expected, before calling this
   // method.
-  int WriteMetadata(IOBuffer* buf, int buf_len, OldCompletionCallback* callback);
+  int WriteMetadata(IOBuffer* buf,
+                    int buf_len,
+                    OldCompletionCallback* callback);
 
   // This transaction is being deleted and we are not done writing to the cache.
   // We need to indicate that the response data was truncated.  Returns true on
   // success.
   bool AddTruncatedFlag();
 
   // Returns the LoadState of the writer transaction of a given ActiveEntry. In
   // other words, returns the LoadState of this transaction without asking the
   // http cache, because this transaction should be the one currently writing
   // to the cache entry.
@@ skipping 265 matching lines @@
   uint64 final_upload_progress_;
   OldCompletionCallbackImpl<Transaction> io_callback_;
   scoped_refptr<CancelableOldCompletionCallback<Transaction> > cache_callback_;
   scoped_refptr<CancelableOldCompletionCallback<Transaction> >
       write_headers_callback_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_CACHE_TRANSACTION_H_