Have WebFrameClient::suddenTerminationDisablerChanged return a boolean

Source/web/FrameLoaderClientImpl.cpp

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 911 matching lines @@
 }
 
 unsigned FrameLoaderClientImpl::backForwardLength()
 {
     WebViewImpl* webview = m_webFrame->viewImpl();
     if (!webview || !webview->client())
         return 0;
     return webview->client()->historyBackListCount() + 1 + webview->client()->historyForwardListCount();
 }
 
-void FrameLoaderClientImpl::suddenTerminationDisablerChanged(int variation, SuddenTerminationDisablerType type)
+void FrameLoaderClientImpl::suddenTerminationDisablerChanged(bool present, SuddenTerminationDisablerType type)
 {
     if (m_webFrame->client()) {
         m_webFrame->client()->suddenTerminationDisablerChanged(
-            variation, static_cast<WebFrameClient::SuddenTerminationDisablerType>(type));
+            present, static_cast<WebFrameClient::SuddenTerminationDisablerType>(type));
     }
 }
 
 } // namespace blink