Add a command line flag to force all network traffic through a particular ser...

net/base/host_resolver.h

 // Copyright (c) 2006-2008 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 NET_BASE_HOST_RESOLVER_H_
 #define NET_BASE_HOST_RESOLVER_H_
 
 #include <string>
 
 #include "base/ref_counted.h"
@@ skipping 98 matching lines @@
   // be called.
   virtual ~HostResolver() {}
 
   // Resolves the given hostname (or IP address literal), filling out the
   // |addresses| object upon success.  The |info.port| parameter will be set as
   // the sin(6)_port field of the sockaddr_in{6} struct.  Returns OK if
   // successful or an error code upon failure.
   //
   // When callback is null, the operation completes synchronously.
   //
-  // When callback is non-null, the operation will be performed asynchronously.
-  // ERR_IO_PENDING is returned if it has been scheduled successfully. Real
-  // result code will be passed to the completion callback. If |req| is
-  // non-NULL, then |*req| will be filled with a handle to the async request.
-  // This handle is not valid after the request has completed.
+  // When callback is non-null, the operation may be performed asynchronously.
+  // If the operation cannnot be completed synchronously, ERR_IO_PENDING will
+  // be returned and the real result code will be passed to the completion
+  // callback.  Otherwise the result code is returned immediately from this
+  // call.
+  // If |req| is non-NULL, then |*req| will be filled with a handle to the
+  // async request. This handle is not valid after the request has completed.
   //
   // Profiling information for the request is saved to |load_log| if non-NULL.
   virtual int Resolve(const RequestInfo& info,
                       AddressList* addresses,
                       CompletionCallback* callback,
                       RequestHandle* out_req,
                       LoadLog* load_log) = 0;
 
   // Cancels the specified request. |req| is the handle returned by Resolve().
   // After a request is cancelled, its completion callback will not be called.
@@ skipping 65 matching lines @@
 };
 
 // Creates a HostResolver implementation that queries the underlying system.
 // (Except if a unit-test has changed the global HostResolverProc using
 // ScopedHostResolverProc to intercept requests to the system).
 HostResolver* CreateSystemHostResolver();
 
 }  // namespace net
 
 #endif  // NET_BASE_HOST_RESOLVER_H_