[Extensions] Expand bindings access checks

extensions/renderer/display_source_custom_bindings.cc

 // Copyright 2015 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 "extensions/renderer/display_source_custom_bindings.h"
 
 #include <stdint.h>
 
 #include "base/bind.h"
 #include "content/public/child/v8_value_converter.h"
@@ skipping 11 matching lines @@
 const char kErrorNotSupported[] = "Not supported";
 const char kInvalidStreamArgs[] = "Invalid stream arguments";
 const char kSessionAlreadyStarted[] = "The session has been already started";
 const char kSessionAlreadyTerminating[] = "The session is already terminating";
 const char kSessionNotFound[] = "Session not found";
 }  // namespace
 
 DisplaySourceCustomBindings::DisplaySourceCustomBindings(ScriptContext* context)
     : ObjectBackedNativeHandler(context),
       weak_factory_(this) {
-  RouteFunction("StartSession",
+  RouteFunction("StartSession", "displaySource",
                 base::Bind(&DisplaySourceCustomBindings::StartSession,
                            weak_factory_.GetWeakPtr()));
-  RouteFunction("TerminateSession",
+  RouteFunction("TerminateSession", "displaySource",
                 base::Bind(&DisplaySourceCustomBindings::TerminateSession,
                            weak_factory_.GetWeakPtr()));
 }
 
 DisplaySourceCustomBindings::~DisplaySourceCustomBindings() {
 }
 
 void DisplaySourceCustomBindings::Invalidate() {
   session_map_.clear();
   weak_factory_.InvalidateWeakPtrs();
@@ skipping 251 matching lines @@
 }
 
 void DisplaySourceCustomBindings::OnSessionError(int sink_id,
                                                  DisplaySourceErrorType type,
                                                  const std::string& message) {
   CHECK(GetDisplaySession(sink_id));
   DispatchSessionError(sink_id, type, message);
 }
 
 }  // extensions