Enable Clang warnings for implementation files on all platforms.

chrome/browser/history/android/android_urls_database_unittest.cc

 // Copyright (c) 2012 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 "chrome/browser/history/android/android_urls_database.h"
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/path_service.h"
 #include "chrome/browser/history/history_database.h"
 #include "chrome/browser/history/history_unittest_base.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/test/base/testing_profile.h"
 
 namespace history {
 
 class AndroidURLsMigrationTest : public HistoryUnitTestBase {
  public:
   AndroidURLsMigrationTest() {
   }
-  ~AndroidURLsMigrationTest() {
-  }
+  virtual ~AndroidURLsMigrationTest() {}
 
  protected:
   virtual void SetUp() {
     profile_.reset(new TestingProfile);
 
     base::FilePath data_path;
     ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &data_path));
     data_path = data_path.AppendASCII("History");
 
     history_db_name_ = profile_->GetPath().Append(chrome::kHistoryFilename);
@@ skipping 25 matching lines @@
 
   ASSERT_TRUE(statement.Step());
   EXPECT_EQ(4, statement.ColumnInt64(0));
   EXPECT_EQ("www.google.com/", statement.ColumnString(2));
   EXPECT_EQ(3, statement.ColumnInt64(1));
 
   EXPECT_FALSE(statement.Step());
 }
 
 }  // namespace history