Clean up of -Wunused-but-set-variable (gcc 4.6)

base/id_map_unittest.cc

 // 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.
 
 #include "base/id_map.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
@@ skipping 147 matching lines @@
 
   EXPECT_EQ(external_del_count, kCount);
   EXPECT_EQ(owned_del_count, kCount);
 }
 
 TEST_F(IDMapTest, OwningPointersDeletesThemOnDestruct) {
   const int kCount = 3;
 
   int external_del_count = 0;
   DestructorCounter* external_obj[kCount];
-  int map_external_ids[kCount];
 
   int owned_del_count = 0;
   DestructorCounter* owned_obj[kCount];
-  int map_owned_ids[kCount];
 
   {
     IDMap<DestructorCounter> map_external;
     IDMap<DestructorCounter, IDMapOwnPointer> map_owned;
 
     for (int i = 0; i < kCount; ++i) {
       external_obj[i] = new DestructorCounter(&external_del_count);
-      map_external_ids[i] = map_external.Add(external_obj[i]);
+      map_external.Add(external_obj[i]);
 
       owned_obj[i] = new DestructorCounter(&owned_del_count);
-      map_owned_ids[i] = map_owned.Add(owned_obj[i]);
+      map_owned.Add(owned_obj[i]);
     }
   }
 
   EXPECT_EQ(external_del_count, 0);
 
   for (int i = 0; i < kCount; ++i) {
     delete external_obj[i];
   }
 
   EXPECT_EQ(external_del_count, kCount);
   EXPECT_EQ(owned_del_count, kCount);
 }
 
 }  // namespace