Remove implicit HANDLE conversions from chrome.

chrome/installer/util/installer_state_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 <windows.h>
 
 #include <fstream>
 
 #include "base/base_paths.h"
 #include "base/command_line.h"
@@ skipping 468 matching lines @@
   EXPECT_FALSE(MockInstallerState::IsFileInUse(temp_file));
 
   {
     // Open a handle to the file with the same access mode and sharing options
     // as the loader.
     base::win::ScopedHandle temp_handle(
         CreateFile(temp_file.value().c_str(),
                    SYNCHRONIZE | FILE_EXECUTE,
                    FILE_SHARE_DELETE | FILE_SHARE_READ,
                    NULL, OPEN_EXISTING, 0, 0));
-    ASSERT_TRUE(temp_handle != NULL);
+    ASSERT_TRUE(temp_handle.IsValid());
 
     // The file should now be in use.
     EXPECT_TRUE(MockInstallerState::IsFileInUse(temp_file));
   }
 
   // And once the handle is gone, it should no longer be in use.
   EXPECT_FALSE(MockInstallerState::IsFileInUse(temp_file));
 }
 
 TEST_F(InstallerStateTest, RemoveOldVersionDirs) {
@@ skipping 318 matching lines @@
   // Critical update newer than the new version.
   EXPECT_FALSE(
       installer_state.DetermineCriticalVersion(NULL, *pv_version_).IsValid());
   EXPECT_FALSE(
       installer_state.DetermineCriticalVersion(opv_version_, *pv_version_)
           .IsValid());
   EXPECT_FALSE(
       installer_state.DetermineCriticalVersion(pv_version_, *pv_version_)
           .IsValid());
 }