Delete some dead code.

ui/accessibility/ax_tree_unittest.cc

 // Copyright 2013 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 "base/memory/scoped_ptr.h"
 #include "base/strings/string_number_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/accessibility/ax_node.h"
 #include "ui/accessibility/ax_serializable_tree.h"
 #include "ui/accessibility/ax_tree.h"
@@ skipping 14 matching lines @@
   }
 
   virtual void OnNodeChanged(AXNode* node) OVERRIDE {
     changed_ids_.push_back(node->id());
   }
 
   virtual void OnRootChanged(AXNode* new_root) OVERRIDE {
     new_root_ids_.push_back(new_root->id());
   }
 
-  void Reset() {
-    deleted_ids_.clear();
-    created_ids_.clear();
-    changed_ids_.clear();
-    new_root_ids_.clear();
-  }
-
   const std::vector<int32>& deleted_ids() { return deleted_ids_; }
   const std::vector<int32>& created_ids() { return created_ids_; }
-  const std::vector<int32>& changed_ids() { return changed_ids_; }
   const std::vector<int32>& new_root_ids() { return new_root_ids_; }
 
  private:
   std::vector<int32> deleted_ids_;
   std::vector<int32> created_ids_;
   std::vector<int32> changed_ids_;
   std::vector<int32> new_root_ids_;
 };
 
 }  // namespace
@@ skipping 187 matching lines @@
   EXPECT_EQ(2, fake_delegate.created_ids()[0]);
   EXPECT_EQ(3, fake_delegate.created_ids()[1]);
 
   ASSERT_EQ(1U, fake_delegate.new_root_ids().size());
   EXPECT_EQ(2, fake_delegate.new_root_ids()[0]);
 
   tree.SetDelegate(NULL);
 }
 
 }  // namespace ui