[DevTools] Narrow down DevToolsNetworkInterceptor::Throttable.

chrome/browser/devtools/devtools_network_transaction.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_TRANSACTION_H_
 #define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_TRANSACTION_H_
 
 #include <stdint.h>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 36 matching lines @@
  public:
   static const char kDevToolsEmulateNetworkConditionsClientId[];
 
   DevToolsNetworkTransaction(
       DevToolsNetworkController* controller,
       scoped_ptr<net::HttpTransaction> network_transaction);
 
   ~DevToolsNetworkTransaction() override;
 
   // DevToolsNetworkInterceptor::Throttable implementation.
-  bool HasStarted() override;
-  bool HasFailed() override;
   void Fail() override;
   int64_t ThrottledByteCount() override;
   void Throttled(int64_t count) override;
   void ThrottleFinished() override;
   void GetSendEndTiming(base::TimeTicks* send_end) override;
 
   // HttpTransaction methods:
   int Start(const net::HttpRequestInfo* request,
             const net::CompletionCallback& callback,
             const net::BoundNetLog& net_log) override;
@@ skipping 77 matching lines @@
   int throttled_result_;
   int64_t throttled_byte_count_;
   CallbackType callback_type_;
   net::CompletionCallback proxy_callback_;
   net::CompletionCallback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsNetworkTransaction);
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_TRANSACTION_H_