[DevTools] Refactor connection-related classes.

third_party/WebKit/Source/devtools/front_end/bindings/BreakpointManager.js

 /*
  * Copyright (C) 2011 Google 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 780 matching lines @@
             return false;
         var scriptFile = this._debuggerWorkspaceBinding.scriptFile(uiSourceCode, this.target());
         return !!scriptFile && scriptFile.hasDivergedFromVM();
     },
 
     /**
      * @param {function()} callback
      */
     _updateInDebugger: function(callback)
     {
-        if (this.target().isDetached()) {
+        if (this.target().isDisposed()) {
             this._cleanUpAfterDebuggerIsGone();
             callback();
             return;
         }
 
         var uiSourceCode = this._breakpoint.uiSourceCode();
         var lineNumber = this._breakpoint._lineNumber;
         var columnNumber = this._breakpoint._columnNumber;
         var condition = this._breakpoint.condition();
 
@@ skipping 263 matching lines @@
 {
     this.sourceFileId = breakpoint._sourceFileId;
     this.lineNumber = breakpoint.lineNumber();
     this.columnNumber = breakpoint.columnNumber();
     this.condition = breakpoint.condition();
     this.enabled = breakpoint.enabled();
 };
 
 /** @type {!WebInspector.BreakpointManager} */
 WebInspector.breakpointManager;