UDP NetConnectivity tests - added read/write states to handle pending

chrome/browser/net/network_stats.h

Index: chrome/browser/net/network_stats.h
diff --git a/chrome/browser/net/network_stats.h b/chrome/browser/net/network_stats.h
index 206f6228d5d1d5080bfce6029c15be69e659c5b6..562eb759bf763d120b5f2b075d20578f50a00339 100644
--- a/chrome/browser/net/network_stats.h
+++ b/chrome/browser/net/network_stats.h
@@ -66,6 +66,16 @@ class NetworkStats {
     STATUS_MAX,            // Bounding value.
   };
 
+  enum ReadState {         // Used to track if |socket_| has a pending read.
+    READ_STATE_IDLE,
+    READ_STATE_READ_PENDING,
+  };
+
+  enum WriteState {        // Used to track if |socket_| has a pending write.
+    WRITE_STATE_IDLE,
+    WRITE_STATE_WRITE_PENDING,
+  };
+
   // |TestType| specifies the possible tests we may run
   // (except for the first and the last serving as boundaries).
   enum TestType {
@@ -306,6 +316,10 @@ class NetworkStats {
   // Token received from server for authentication.
   ProbePacket_Token token_;
 
+  // The state variables to track pending reads/writes.
+  ReadState read_state_;
+  WriteState write_state_;
+
   // We use this factory to create timeout tasks for socket's ReadData.
   base::WeakPtrFactory<NetworkStats> weak_factory_;