Add load states for stalled requests

net/base/load_states_list.h

 // Copyright (c) 2012 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 is the list of load states and their values. For the enum values,
 // include the file "net/base/load_states.h".
 //
 // Here we define the values using a macro LOAD_STATE, so it can be
 // expanded differently in some places (for example, to automatically
 // map a load flag value to its symbolic name).
 
 // This is the default state.  It corresponds to a resource load that has
 // either not yet begun or is idle waiting for the consumer to do something
 // to move things along (e.g., the consumer of an URLRequest may not have
 // called Read yet).
 LOAD_STATE(IDLE)
 
+// When a socket pool group is below the maximum number of sockets allowed per
+// group, but a new socket cannot be created due to the per-pool socket limit,
+// this state is returned by all requests for the group waiting on an idle
+// connection, except those that may be serviced by a pending new connection.
+LOAD_STATE(WAITING_FOR_STALLED_SOCKET_POOL)
+
+// When a socket pool group has reached the maximum number of sockets allowed
+// per group, this state is returned for all requests that don't have a socket,
+// except those that correspond to a pending new connection.
+LOAD_STATE(WAITING_FOR_AVAILABLE_SOCKET)
+
 // This state indicates that the URLRequest delegate has chosen to block this
 // request before it was sent over the network. When in this state, the
 // delegate should set a load state parameter on the URLRequest describing
 // the nature of the delay (i.e. "Waiting for <description given by
 // delegate>").
 LOAD_STATE(WAITING_FOR_DELEGATE)
 
 // This state corresponds to a resource load that is blocked waiting for
 // access to a resource in the cache.  If multiple requests are made for the
 // same resource, the first request will be responsible for writing (or
@@ skipping 50 matching lines @@
 // corresponds to the period after the request is sent and before all of the
 // response headers have been received.
 LOAD_STATE(WAITING_FOR_RESPONSE)
 
 // This state corresponds to a resource load that is blocked waiting for a
 // read to complete.  In the case of a HTTP transaction, this corresponds to
 // the period after the response headers have been received and before all of
 // the response body has been downloaded.  (NOTE: This state only applies for
 // an URLRequest while there is an outstanding Read operation.)
 LOAD_STATE(READING_RESPONSE)