Bug 86135 Make use of new IResource#revertModificationStamp(long) API
org.eclipse.ltk.core.refactoring/src/org/eclipse/ltk/internal/core/refactoring/BufferValidationState.java
private ContentStamp fContentStamp;
	
	public SavedBufferValidationState(IFile file) {
		super(file);
		fContentStamp= ContentStamps.get(file, true);