IDL: Remove support for [LogPreviousValue] extended attribute

Source/bindings/tests/idls/core/TestObject.idl

 /*
  * Copyright (C) 2013 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 233 matching lines @@
     [TreatReturnedNullStringAs=Null] attribute ByteString treatReturnedNullStringAsNullByteStringAttribute;
     [TreatReturnedNullStringAs=Undefined] attribute ByteString treatReturnedNullStringAsUndefinedByteStringAttribute;
     [TreatReturnedNullStringAs=Null] attribute ScalarValueString treatReturnedNullStringAsNullScalarValueStringAttribute;
     [TreatReturnedNullStringAs=Undefined] attribute ScalarValueString treatReturnedNullStringAsUndefinedScalarValueStringAttribute;
     [TypeChecking=Interface] attribute float typeCheckingInterfaceFloatAttribute; // nop for non-interface types
     [TypeChecking=Interface] attribute TestInterface typeCheckingInterfaceTestInterfaceAttribute;
     [TypeChecking=Interface] attribute TestInterface? typeCheckingInterfaceTestInterfaceOrNullAttribute;
     [Reflect, URL] attribute DOMString urlStringAttribute;
     [Reflect=reflectUrlAttribute, URL] attribute DOMString urlStringAttribute;
     [Unforgeable] attribute long unforgeableLongAttribute;
-    [LogActivity=SetterOnly, LogPreviousValue] attribute DOMString? activityLoggingSetterOnlyLogPreviousValueAttribute;
-    [LogActivity, LogPreviousValue] attribute TestInterfaceEmpty activityLoggingLogPreviousValueInterfaceAttribute;
 
 
     // Methods
     //
     // Naming convention:
     // ReturnType returnTypeMethodTypeName1ArgTypeName2Arg(Type1 typeName1Arg, Type2 typeName2Arg);
     // E.g.,
     // void voidMethodStringArgLongArrayArg(DOMString stringArg, long[] longArrayArg);
     void voidMethod();
     static void staticVoidMethod();
@@ skipping 282 matching lines @@
     [ImplementedInPrivateScript] readonly attribute short readonlyShortAttribute;
     [ImplementedInPrivateScript] attribute short shortAttribute;
     [ImplementedInPrivateScript] attribute DOMString stringAttribute;
     [ImplementedInPrivateScript] attribute Node nodeAttribute;
     [OnlyExposedToPrivateScript] short methodImplementedInCPPForPrivateScriptOnly(short value1, short value2);
     [OnlyExposedToPrivateScript] attribute DOMString attributeImplementedInCPPForPrivateScriptOnly;
     [ImplementedInPrivateScript, OnlyExposedToPrivateScript] short methodForPrivateScriptOnly(short value1, short value2);
     [ImplementedInPrivateScript, OnlyExposedToPrivateScript] attribute DOMString attributeForPrivateScriptOnly;
     [ImplementedInPrivateScript] attribute TestEnum enumForPrivateScript;
 };