Move a bunch of content\common code into the content namespace.

content/common/socket_stream_handle_data.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 "content/common/socket_stream_handle_data.h"
 
 #include "webkit/glue/websocketstreamhandle_impl.h"
 
 using webkit_glue::WebSocketStreamHandleImpl;
 using WebKit::WebSocketStreamHandle;
 
+namespace content {
+
 // static
 void SocketStreamHandleData::AddToHandle(
     WebSocketStreamHandle* handle, int render_view_id) {
   if (!handle) {
     NOTREACHED();
     return;
   }
   WebSocketStreamHandleImpl* impl =
       static_cast<WebSocketStreamHandleImpl*>(handle);
   impl->SetUserData(handle, new SocketStreamHandleData(render_view_id));
 }
 
 // static
 const SocketStreamHandleData* SocketStreamHandleData::ForHandle(
     WebSocketStreamHandle* handle) {
   if (!handle)
     return NULL;
   WebSocketStreamHandleImpl* impl =
       static_cast<WebSocketStreamHandleImpl*>(handle);
   return static_cast<SocketStreamHandleData*>(impl->GetUserData(handle));
 }
+
+}  // namespace content