Prevented connecting drag drop events to a SwappedOut RenderViewHost in WebContentsViewGtk

content/browser/web_contents/web_contents_view_mac.mm

 // Copyright (c) 2012 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.
 
 #import <Carbon/Carbon.h>
 
 #import "content/browser/web_contents/web_contents_view_mac.h"
 
 #include <string>
 
@@ skipping 318 matching lines @@
 }
 
 
 void WebContentsViewMac::RenderViewCreated(RenderViewHost* host) {
   // We want updates whenever the intrinsic width of the webpage changes.
   // Put the RenderView into that mode. The preferred width is used for example
   // when the "zoom" button in the browser window is clicked.
   host->EnablePreferredSizeMode();
 }
 
-void WebContentsViewMac::RenderViewSwappedIn(RenderViewHost* host) {
+void WebContentsViewMac::RenderViewSwappedIn(RenderViewHost* new_host,
+                                             RenderViewHost* old_host) {
 }
 
 bool WebContentsViewMac::IsEventTracking() const {
   return base::MessagePumpMac::IsHandlingSendEvent();
 }
 
 // Arrange to call CloseTab() after we're back to the main event loop.
 // The obvious way to do this would be PostNonNestableTask(), but that
 // will fire when the event-tracking loop polls for events.  So we
 // need to bounce the message via Cocoa, instead.
@@ skipping 206 matching lines @@
       [[[notification userInfo] objectForKey:kSelectionDirection]
         unsignedIntegerValue];
   if (direction == NSDirectSelection)
     return;
 
   [self webContents]->
       FocusThroughTabTraversal(direction == NSSelectingPrevious);
 }
 
 @end