[DevTools] Narrow down DevToolsNetworkInterceptor::Throttable.

chrome/browser/devtools/devtools_network_interceptor.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_INTERCEPTOR_H_
 #define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_INTERCEPTOR_H_
 
 #include <set>
 #include <string>
 #include <utility>
@@ skipping 10 matching lines @@
 class TimeTicks;
 }
 
 // DevToolsNetworkInterceptor emulates network conditions for transactions with
 // specific client id.
 class DevToolsNetworkInterceptor {
  public:
   class Throttable {
    public:
     virtual ~Throttable() {}
-    virtual bool HasStarted() = 0;
-    virtual bool HasFailed() = 0;
     virtual void Fail() = 0;
     virtual int64_t ThrottledByteCount() = 0;
     virtual void Throttled(int64_t count) = 0;
     virtual void ThrottleFinished() = 0;
     virtual void GetSendEndTiming(base::TimeTicks* send_end) = 0;
   };
 
   DevToolsNetworkInterceptor();
   virtual ~DevToolsNetworkInterceptor();
 
@@ skipping 38 matching lines @@
   base::TimeDelta tick_length_;
   base::TimeDelta latency_length_;
   uint64_t last_tick_;
 
   base::WeakPtrFactory<DevToolsNetworkInterceptor> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsNetworkInterceptor);
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_INTERCEPTOR_H_