On Linux, move the passing of filedescriptors to a dedicated socketpair().

chrome/tools/test/reference_build/chrome_linux/resources/inspector/Callback.js

+/*
+ * Copyright (C) 2009 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
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WebInspector.Callback = function()
+{
+    this._lastCallbackId = 1;
+    this._callbacks = {};
+}
+
+WebInspector.Callback.prototype = {
+    wrap: function(callback)
+    {
+        var callbackId = this._lastCallbackId++;
+        this._callbacks[callbackId] = callback || function() {};
+        return callbackId;
+    },
+
+    processCallback: function(callbackId, opt_vararg)
+    {
+        var args = Array.prototype.slice.call(arguments, 1);
+        var callback = this._callbacks[callbackId];
+        callback.apply(null, args);
+        delete this._callbacks[callbackId];
+    }
+}
+
+WebInspector.Callback._INSTANCE = new WebInspector.Callback();
+WebInspector.Callback.wrap = WebInspector.Callback._INSTANCE.wrap.bind(WebInspector.Callback._INSTANCE);
+WebInspector.Callback.processCallback = WebInspector.Callback._INSTANCE.processCallback.bind(WebInspector.Callback._INSTANCE);