Move remaining Autofill code to //components/autofill.

chrome/browser/autofill/autofill_scanner.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/browser/autofill/autofill_scanner.h"
-
-#include "base/logging.h"
-#include "chrome/browser/autofill/autofill_field.h"
-
-AutofillScanner::AutofillScanner(
-    const std::vector<const AutofillField*>& fields)
-    : cursor_(fields.begin()),
-      saved_cursor_(fields.begin()),
-      begin_(fields.begin()),
-      end_(fields.end()) {
-}
-
-AutofillScanner::~AutofillScanner() {
-}
-
-void AutofillScanner::Advance() {
-  DCHECK(!IsEnd());
-  ++cursor_;
-}
-
-const AutofillField* AutofillScanner::Cursor() const {
-  if (IsEnd()) {
-    NOTREACHED();
-    return NULL;
-  }
-
-  return *cursor_;
-}
-
-bool AutofillScanner::IsEnd() const {
-  return cursor_ == end_;
-}
-
-void AutofillScanner::Rewind() {
-  DCHECK(saved_cursor_ != end_);
-  cursor_ = saved_cursor_;
-  saved_cursor_ = end_;
-}
-
-void AutofillScanner::RewindTo(size_t index) {
-  DCHECK(index < static_cast<size_t>(end_ - begin_));
-  cursor_ = begin_ + index;
-  saved_cursor_ = end_;
-}
-
-size_t AutofillScanner::SaveCursor() {
-  saved_cursor_ = cursor_;
-  return static_cast<size_t>(cursor_ - begin_);
-}