Gather preconnection use vs waste statistics

I now gather statistics only in the transport socket
classes TcpClientSocket*.  All other socket classes
forward significant data (that they are used in
a speculation) to their transport class, where
this data is stored, and then dumped when the
TCP socket is closed.

This CL also repaired a slight miscount in bytes
read and written on Windows, as error codes
were mistakenly accumulated as byte counts.

This CL repaired a significant undercounting 
in linux/mac via StatsCounter (the logging counter
appears correct).

Libjingle support is minimal (NOTREACHED), but
I don't know that there are subresources that will
be speculatively preconnected from that class (and
it is less obvious how the class uses underlying
sockets, if at all).

BUG=42694
r=willchan
Review URL: http://codereview.chromium.org/3163033

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@57377 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 7 insertions, 1 deletions

diff --git a/net/socket/tcp_client_socket_win.h b/net/socket/tcp_client_socket_win.h
index 8940978..bd31960 100644
--- a/net/socket/tcp_client_socket_win.h
+++ b/net/socket/tcp_client_socket_win.h
@@ -28,7 +28,7 @@ class TCPClientSocketWin : public ClientSocket, NonThreadSafe {
                      net::NetLog* net_log,
                      const net::NetLog::Source& source);
 
-  ~TCPClientSocketWin();
+  virtual ~TCPClientSocketWin();
 
   // ClientSocket methods:
   virtual int Connect(CompletionCallback* callback);
@@ -37,6 +37,8 @@ class TCPClientSocketWin : public ClientSocket, NonThreadSafe {
   virtual bool IsConnectedAndIdle() const;
   virtual int GetPeerAddress(AddressList* address) const;
   virtual const BoundNetLog& NetLog() const { return net_log_; }
+  virtual void SetSubresourceSpeculation();
+  virtual void SetOmniboxSpeculation();
 
   // Socket methods:
   // Multiple outstanding requests are not supported.
@@ -114,6 +116,10 @@ class TCPClientSocketWin : public ClientSocket, NonThreadSafe {
 
   BoundNetLog net_log_;
 
+  // Record of connectivity and transmissions, for use in speculative connection
+  // histograms.
+  UseHistory use_history_;
+
   DISALLOW_COPY_AND_ASSIGN(TCPClientSocketWin);
 };