Clang: enable -Wbool-conversions and -Wunused-variables on Linux.

chrome/browser/sync/syncable/directory_backing_store_unittest.cc

 // Copyright (c) 2010 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 "testing/gtest/include/gtest/gtest.h"
 
 #include <string>
 
 #include "app/sql/connection.h"
 #include "app/sql/statement.h"
@@ skipping 1073 matching lines @@
       connection.DoesColumnExist("models", "last_download_timestamp"));
   ASSERT_TRUE(
       connection.DoesColumnExist("models", "model_id"));
 
   sql::Statement s(connection.GetUniqueStatement("SELECT model_id, "
       "initial_sync_ended, last_download_timestamp FROM models"));
   ASSERT_TRUE(s.Step());
   std::string model_id = s.ColumnString(0);
   EXPECT_EQ("C2881000", base::HexEncode(model_id.data(), model_id.size()))
       << "Model ID is expected to be the empty BookmarkSpecifics proto.";
-  EXPECT_EQ(true, s.ColumnBool(1));
+  EXPECT_TRUE(s.ColumnBool(1));
   EXPECT_EQ(694, s.ColumnInt64(2));
   ASSERT_FALSE(s.Step());
 }
 
 
 TEST_F(DirectoryBackingStoreTest, MigrateVersion71To72) {
   SetUpVersion71Database();
 
   {
     sql::Connection connection;
@@ skipping 447 matching lines @@
 
   STLDeleteElements(&index);
   dbs->LoadEntries(&index);
   EXPECT_EQ(0U, index.size());
 
   dbs->EndLoad();
   dbs->EndSave();
 }
 
 }  // namespace syncable