Fix the Declarative WebRequest API for <webview>

chrome/browser/guest_view/web_view/web_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 "chrome/browser/guest_view/web_view/web_view_constants.h"
 
 namespace webview {
 
 // Events.
 const char kEventClose[] = "webview.onClose";
 const char kEventConsoleMessage[] = "webview.onConsoleMessage";
 const char kEventContentLoad[] = "webview.onContentLoad";
 const char kEventContextMenu[] = "webview.contextmenu";
 const char kEventDialog[] = "webview.onDialog";
 const char kEventExit[] = "webview.onExit";
 const char kEventFindReply[] = "webview.onFindReply";
 const char kEventFrameNameChanged[] = "webview.onFrameNameChanged";
 const char kEventLoadAbort[] = "webview.onLoadAbort";
 const char kEventLoadCommit[] = "webview.onLoadCommit";
 const char kEventLoadProgress[] = "webview.onLoadProgress";
 const char kEventLoadRedirect[] = "webview.onLoadRedirect";
 const char kEventLoadStart[] = "webview.onLoadStart";
 const char kEventLoadStop[] = "webview.onLoadStop";
+const char kEventMessage[] = "webview.onMessage";
 const char kEventNewWindow[] = "webview.onNewWindow";
 const char kEventPermissionRequest[] = "webview.onPermissionRequest";
 const char kEventResponsive[] = "webview.onResponsive";
 const char kEventSizeChanged[] = "webview.onSizeChanged";
 const char kEventUnresponsive[] = "webview.onUnresponsive";
 const char kEventZoomChange[] = "webview.onZoomChange";
 
 // Parameters/properties on events.
 const char kContextMenuItems[] = "items";
 const char kDefaultPromptText[] = "defaultPromptText";
@@ skipping 51 matching lines @@
 // Initialization parameters.
 const char kParameterUserAgentOverride[] = "userAgentOverride";
 
 // Miscellaneous.
 const char kMenuItemCommandId[] = "commandId";
 const char kMenuItemLabel[] = "label";
 const unsigned int kMaxOutstandingPermissionRequests = 1024;
 const int kInvalidPermissionRequestID = 0;
 
 }  // namespace webview