sync: Remove unused row_iterator.h file.

chrome/browser/sync/util/row_iterator.h

Index: chrome/browser/sync/util/row_iterator.h
diff --git a/chrome/browser/sync/util/row_iterator.h b/chrome/browser/sync/util/row_iterator.h
deleted file mode 100644
index 73748ee4b071e3ed9c61dc6b6d2abec534a0fe8b..0000000000000000000000000000000000000000
--- a/chrome/browser/sync/util/row_iterator.h
+++ /dev/null
@@ -1,122 +0,0 @@
-// Copyright (c) 2009 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.
-
-// A handy type for iterating through query results.
-//
-// Just define your Traits type with
-//
-//   RowType
-//   Extract(statement*, RowType);
-//
-// and then pass an sqlite3_stmt into the constructor for begin,
-// and use the no-arg constructor for an end iterator.  Ex:
-//
-//   for (RowIterator<SomeTraits> i(statement), end; i != end; ++i)
-//     ...
-
-#ifndef CHROME_BROWSER_SYNC_UTIL_ROW_ITERATOR_H_
-#define CHROME_BROWSER_SYNC_UTIL_ROW_ITERATOR_H_
-
-#include "base/logging.h"
-#include "third_party/sqlite/preprocessed/sqlite3.h"
-
-template <typename ColumnType, int index = 0>
-struct SingleColumnTraits {
-  typedef ColumnType RowType;
-  inline void Extract(sqlite3_stmt* statement, ColumnType* x) const {
-    GetColumn(statement, index, x);
-  }
-};
-
-template <typename RowTraits>
-class RowIterator : public std::iterator<std::input_iterator_tag,
-                                         const typename RowTraits::RowType> {
- public:
-  typedef typename RowTraits::RowType RowType;
-  // Statement must have been prepared, but not yet stepped:
-  RowIterator(sqlite3_stmt* statement, RowTraits traits = RowTraits()) {
-    kernel_ = new Kernel;
-    kernel_->done = false;
-    kernel_->refcount = 1;
-    kernel_->statement = statement;
-    kernel_->row_traits = traits;
-    ++(*this);
-  }
-  RowIterator() : kernel_(NULL) { }  // creates end iterator
-
-  RowIterator(const RowIterator& i)
-    : kernel_(NULL) {
-    *this = i;
-  }
-
-  ~RowIterator() {
-    if (kernel_ && 0 == --(kernel_->refcount)) {
-      sqlite3_finalize(kernel_->statement);
-      delete kernel_;
-    }
-  }
-
-  RowIterator& operator = (const RowIterator& i) {
-    if (kernel_ && (0 == --(kernel_->refcount))) {
-      sqlite3_finalize(kernel_->statement);
-      delete kernel_;
-    }
-    kernel_ = i.kernel_;
-    if (kernel_)
-      kernel_->refcount += 1;
-    return *this;
-  }
-
-  RowIterator operator ++(int) {
-    RowIterator i(*this);
-    return ++i;
-  }
-
-  RowIterator& operator ++() {
-    DCHECK(NULL != kernel_);
-    if (SQLITE_ROW == sqlite3_step(kernel_->statement)) {
-      kernel_->row_traits.Extract(kernel_->statement, &kernel_->row);
-    } else {
-      kernel_->done = true;
-    }
-    return *this;
-  }
-
-  const RowType& operator *() const {
-    return *(operator -> ());
-  }
-
-  const RowType* operator ->() const {
-    DCHECK(NULL != kernel_);
-    DCHECK(!kernel_->done);
-    return &(kernel_->row);
-  }
-
-  bool operator == (const RowIterator& i) const {
-    if (kernel_ == i.kernel_)
-      return true;
-    if (NULL == kernel_ && i.kernel_->done)
-      return true;
-    if (NULL == i.kernel_ && kernel_->done)
-      return true;
-    return false;
-  }
-
-  bool operator != (const RowIterator& i) const {
-    return !(*this == i);
-  }
-
- protected:
-  struct Kernel {
-    int refcount;
-    bool done;
-    RowType row;
-    sqlite3_stmt* statement;
-    RowTraits row_traits;
-  };
-
-  Kernel* kernel_;
-};
-
-#endif  // CHROME_BROWSER_SYNC_UTIL_ROW_ITERATOR_H_