Pepper proxy: make the browser sender handle the proxy lock properly.

ppapi/proxy/ppb_tcp_socket_private_proxy.cc

Index: ppapi/proxy/ppb_tcp_socket_private_proxy.cc
diff --git a/ppapi/proxy/ppb_tcp_socket_private_proxy.cc b/ppapi/proxy/ppb_tcp_socket_private_proxy.cc
index a032811604fcf1825cfeaaf776ec0c4c93d0805b..7f11b28ff813281a0329a49bb2dd40e19c21327d 100644
--- a/ppapi/proxy/ppb_tcp_socket_private_proxy.cc
+++ b/ppapi/proxy/ppb_tcp_socket_private_proxy.cc
@@ -9,7 +9,6 @@
 #include "base/logging.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/plugin_globals.h"
-#include "ppapi/proxy/plugin_proxy_delegate.h"
 #include "ppapi/proxy/plugin_resource_tracker.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/shared_impl/private/ppb_x509_certificate_private_shared.h"
@@ -118,7 +117,7 @@ void TCPSocket::SendDisconnect() {
 }
 
 void TCPSocket::SendToBrowser(IPC::Message* msg) {
-  PluginGlobals::Get()->plugin_proxy_delegate()->SendToBrowser(msg);
+  PluginGlobals::Get()->GetBrowserSender()->Send(msg);
 }
 
 }  // namespace
@@ -140,7 +139,7 @@ PP_Resource PPB_TCPSocket_Private_Proxy::CreateProxyResource(
     return 0;
 
   uint32 socket_id = 0;
-  PluginGlobals::Get()->plugin_proxy_delegate()->SendToBrowser(
+  PluginGlobals::Get()->GetBrowserSender()->Send(
       new PpapiHostMsg_PPBTCPSocket_Create(
           API_ID_PPB_TCPSOCKET_PRIVATE, dispatcher->plugin_dispatcher_id(),
           &socket_id));