Implement <webview> droplink event

extensions/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 "extensions/browser/guest_view/web_view/web_view_constants.h"
 
 namespace webview {
 
 // Attributes.
 const char kAttributeAllowTransparency[] = "allowtransparency";
 const char kAttributeAllowScaling[] = "allowscaling";
 const char kAttributeName[] = "name";
 const char kAttributeSrc[] = "src";
 
 // API namespace.
 const char kAPINamespace[] = "webViewInternal";
 
 // API error messages.
 const char kAPILoadDataInvalidDataURL[] = "Invalid data URL \"%s\".";
 const char kAPILoadDataInvalidBaseURL[] = "Invalid base URL \"%s\".";
 const char kAPILoadDataInvalidVirtualURL[] = "Invalid virtual URL \"%s\".";
 
 // Events.
 const char kEventClose[] = "webViewInternal.onClose";
 const char kEventConsoleMessage[] = "webViewInternal.onConsoleMessage";
 const char kEventContentLoad[] = "webViewInternal.onContentLoad";
 const char kEventContextMenu[] = "chromeWebViewInternal.contextmenu";
 const char kEventDialog[] = "webViewInternal.onDialog";
+const char kEventDropLink[] = "webViewInternal.onDropLink";
 const char kEventExit[] = "webViewInternal.onExit";
 const char kEventFindReply[] = "webViewInternal.onFindReply";
 const char kEventFrameNameChanged[] = "webViewInternal.onFrameNameChanged";
 const char kEventLoadAbort[] = "webViewInternal.onLoadAbort";
 const char kEventLoadCommit[] = "webViewInternal.onLoadCommit";
 const char kEventLoadProgress[] = "webViewInternal.onLoadProgress";
 const char kEventLoadRedirect[] = "webViewInternal.onLoadRedirect";
 const char kEventLoadStart[] = "webViewInternal.onLoadStart";
 const char kEventLoadStop[] = "webViewInternal.onLoadStop";
 const char kEventMessage[] = "webViewInternal.onMessage";
@@ skipping 68 matching lines @@
 
 // Miscellaneous.
 const char kMenuItemCommandId[] = "commandId";
 const char kMenuItemLabel[] = "label";
 const char kPersistPrefix[] = "persist:";
 const char kStoragePartitionId[] = "partition";
 const unsigned int kMaxOutstandingPermissionRequests = 1024;
 const int kInvalidPermissionRequestID = 0;
 
 }  // namespace webview