Remove implicit HANDLE conversions from base.

base/debug/gdi_debug_util_win.cc

 // Copyright 2014 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/debug/gdi_debug_util_win.h"
 
 #include <cmath>
 
 #include <psapi.h>
 #include <TlHelp32.h>
 
@@ skipping 23 matching lines @@
     CHECK(false);
 
   do {
     if (parent_pid != proc_entry.th32ParentProcessID)
       continue;
     // Got a child process. Compute GDI usage.
     base::win::ScopedHandle process(
         ::OpenProcess(PROCESS_QUERY_INFORMATION,
                       FALSE,
                       proc_entry.th32ParentProcessID));
-    if (!process)
+    if (!process.IsValid())
       continue;
 
     int num_gdi_handles = ::GetGuiResources(process.Get(), GR_GDIOBJECTS);
     int num_user_handles = ::GetGuiResources(process.Get(), GR_USEROBJECTS);
 
     // Compute sum and peak counts.
     ++child_count;
     sum_user_count += num_user_handles;
     sum_gdi_count += num_gdi_handles;
     if (peak_gdi_count < num_gdi_handles)
@@ skipping 65 matching lines @@
     HBITMAP small_bitmap = CreateDIBSection(
         NULL, reinterpret_cast<BITMAPINFO*>(&header),
         0, &small_data, shared_section, 0);
   }
   // Maybe the child processes are the ones leaking GDI or USER resouces.
   CollectChildGDIUsageAndDie(::GetCurrentProcessId());
 }
 
 }  // namespace debug
 }  // namespace base