[IndexedDB] Fix cursor pooling IsValid().

content/browser/indexed_db/leveldb/leveldb_transaction_unittest.cc

 // Copyright 2017 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 <stddef.h>
 
 #include <algorithm>
 #include <cstring>
 #include <string>
 
@@ skipping 232 matching lines @@
   evicted_normal_location->Seek("key1");
   evicted_before_start->Seek("key1");
   evicted_before_start->Prev();
   evicted_after_end->SeekToLast();
   evicted_after_end->Next();
 
   // Nothing is purged, as we just have 3 iterators used.
   EXPECT_FALSE(evicted_normal_location->IsDetached());
   EXPECT_FALSE(evicted_before_start->IsDetached());
   EXPECT_FALSE(evicted_after_end->IsDetached());
-  EXPECT_FALSE(evicted_before_start->IsValid());
-  EXPECT_FALSE(evicted_after_end->IsValid());
 
   // Should purge all of our earlier iterators.
   it1->Seek("key1");
   it2->Seek("key2");
   it3->Seek("key3");
 
   EXPECT_TRUE(evicted_normal_location->IsDetached());
   EXPECT_TRUE(evicted_before_start->IsDetached());
   EXPECT_TRUE(evicted_after_end->IsDetached());
 
+  EXPECT_FALSE(evicted_before_start->IsValid());
+  EXPECT_TRUE(evicted_normal_location->IsValid());
+  EXPECT_FALSE(evicted_after_end->IsValid());
+
   // Check we don't need to reload for just the key.
   EXPECT_EQ("key1", evicted_normal_location->Key());
   EXPECT_TRUE(evicted_normal_location->IsDetached());
 
   // Make sure iterators are reloaded correctly.
   EXPECT_TRUE(evicted_normal_location->IsValid());
   EXPECT_EQ("value1", evicted_normal_location->Value());
   EXPECT_FALSE(evicted_normal_location->IsDetached());
   EXPECT_FALSE(evicted_before_start->IsValid());
   EXPECT_FALSE(evicted_after_end->IsValid());
@@ skipping 146 matching lines @@
   EXPECT_EQ(Compare(key_after_range_, it->Key()), 0);
 }
 
 INSTANTIATE_TEST_CASE_P(LevelDBTransactionRangeTests,
                         LevelDBTransactionRangeTest,
                         ::testing::Values(DataInMemory,
                                           DataInDatabase,
                                           DataMixed));
 
 }  // namespace content