Allow AccessibilityHostMsg_Notifications messages to be sent from the renderer while it is swapped …

content/renderer/accessibility/renderer_accessibility_complete.cc

 // 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.
 
 #include "content/renderer/accessibility/renderer_accessibility_complete.h"
 
 #include <queue>
 
 #include "base/bind.h"
 #include "base/message_loop.h"
@@ skipping 231 matching lines @@
 RendererAccessibilityComplete::BrowserTreeNode::~BrowserTreeNode() {}
 
 void RendererAccessibilityComplete::SendPendingAccessibilityNotifications() {
   const WebDocument& document = GetMainDocument();
   if (document.isNull())
     return;
 
   if (pending_notifications_.empty())
     return;
 
+  if (render_view_->is_swapped_out())
+    return;
+
   ack_pending_ = true;
 
   // Make a copy of the notifications, because it's possible that
   // actions inside this loop will cause more notifications to be
   // queued up.
   std::vector<AccessibilityHostMsg_NotificationParams> src_notifications =
       pending_notifications_;
   pending_notifications_.clear();
 
   // Generate a notification message from each WebKit notification.
@@ skipping 439 matching lines @@
     render_view()->GetWebView()->clearFocusedNode();
   else
     obj.setFocused(true);
 }
 
 void RendererAccessibilityComplete::OnFatalError() {
   CHECK(false) << "Invalid accessibility tree.";
 }
 
 }  // namespace content