Cloning a bunch of stuff from the native_client repository at r6528

ppapi/native_client/src/shared/ppapi_proxy/browser_ppb_rpc_server.cc

+// Copyright (c) 2010 The Native Client 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 "native_client/src/shared/ppapi_proxy/browser_globals.h"
+#include "native_client/src/shared/ppapi_proxy/utility.h"
+#include "srpcgen/ppb_rpc.h"
+
+using ppapi_proxy::DebugPrintf;
+using ppapi_proxy::GetBrowserInterface;
+
+void PpbRpcServer::PPB_GetInterface(NaClSrpcRpc* rpc,
+                                    NaClSrpcClosure* done,
+                                    char* interface_name,
+                                    int32_t* exports_interface_name) {
+  NaClSrpcClosureRunner runner(done);
+  rpc->result = NACL_SRPC_RESULT_APP_ERROR;
+  // Since the proxy will make calls to proxied interfaces, we need simply
+  // to know whether the plugin exports a given interface.
+  const void* browser_interface = GetBrowserInterface(interface_name);
+  DebugPrintf("PPB_GetInterface('%s'): %p\n",
+              interface_name, browser_interface);
+  *exports_interface_name = (browser_interface != NULL);
+  rpc->result = NACL_SRPC_RESULT_OK;
+}