<webview>: Make contentWindow available prior to attachment (on display:none).

extensions/common/guest_view/guest_view_constants.cc

 // Copyright 2014 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/common/guest_view/guest_view_constants.h"
 
 namespace guestview {
 
 // Sizing attributes/parameters.
 const char kAttributeAutoSize[] = "autosize";
 const char kAttributeMaxHeight[] = "maxheight";
 const char kAttributeMaxWidth[] = "maxwidth";
 const char kAttributeMinHeight[] = "minheight";
 const char kAttributeMinWidth[] = "minwidth";
 const char kElementWidth[] = "elementWidth";
 const char kElementHeight[] = "elementHeight";
 
 // Events.
 const char kEventResize[] = "guestViewInternal.onResize";
 
 // Parameters/properties on events.
+const char kContentWindowID[] = "contentWindowId";
+const char kID[] = "id";
 const char kIsTopLevel[] = "isTopLevel";
 const char kNewWidth[] = "newWidth";
 const char kNewHeight[] = "newHeight";
 const char kOldWidth[] = "oldWidth";
 const char kOldHeight[] = "oldHeight";
 const char kReason[] = "reason";
 const char kUrl[] = "url";
 const char kUserGesture[] = "userGesture";
 
 // Initialization parameters.
 const char kParameterApi[] = "api";
 const char kParameterInstanceId[] = "instanceId";
 
 // Other.
 const char kGuestViewManagerKeyName[] = "guest_view_manager";
 const int kInstanceIDNone = 0;
 const int kDefaultWidth = 300;
 const int kDefaultHeight = 300;
 
 }  // namespace guestview