net: Fix more clang warnings about missing virtual and OVERRIDE annotations.

net/spdy/spdy_session.cc

 // 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.
 
 #include "net/spdy/spdy_session.h"
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 1146 matching lines @@
   SimpleSpdyIOBufferProducer(SpdyFrame* frame,
                              RequestPriority priority)
       : frame_(frame),
         priority_(priority) {
   }
 
   virtual RequestPriority GetPriority() const OVERRIDE {
     return priority_;
   }
 
-  virtual SpdyIOBuffer* ProduceNextBuffer(SpdySession* session) {
+  virtual SpdyIOBuffer* ProduceNextBuffer(SpdySession* session) OVERRIDE {
     return SpdySession::SpdyIOBufferProducer::CreateIOBuffer(
         frame_.get(), priority_, NULL);
   }
 
  private:
   scoped_ptr<SpdyFrame> frame_;
   RequestPriority priority_;
 };
 
 void SpdySession::QueueFrame(SpdyFrame* frame,
@@ skipping 812 matching lines @@
 SSLClientSocket* SpdySession::GetSSLClientSocket() const {
   if (!is_secure_)
     return NULL;
   SSLClientSocket* ssl_socket =
       reinterpret_cast<SSLClientSocket*>(connection_->socket());
   DCHECK(ssl_socket);
   return ssl_socket;
 }
 
 }  // namespace net