Enable GPU control lists in tests on Windows.

chrome/browser/gpu/chrome_gpu_util.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/gpu/chrome_gpu_util.h"
 
 #include "base/command_line.h"
 #if defined(OS_MACOSX)
 #include "base/mac/mac_util.h"
 #endif
@@ skipping 28 matching lines @@
 #if !(defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX))
   return false;
 #endif
 
 // Necessary for linux_chromeos build since it defines both OS_LINUX
 // and OS_CHROMEOS.
 #if defined(OS_CHROMEOS)
   return false;
 #endif
 
-#if defined(OS_WIN)
-  // Don't run the trial on Windows XP.
-  if (base::win::GetVersion() < base::win::VERSION_VISTA)
-    return false;
-#endif

[gab, 2013/10/16 15:12:09]

This could perhaps have caused it if the blacklist isn't used on the perf bots
(i.e. this was removed in this CL as the blacklist is now supposed to enforce
that before the field trials check even kicks in).

-
 #if defined(OS_MACOSX)
   // Browser and content shell tests hang on 10.7 when the Apple software
   // renderer is used. These tests ignore the blacklist (which disables
   // compositing both on 10.7 and when the Apple software renderer is used)
   // by specifying the kSkipGpuDataLoading switch, so disable forced
   // compositing here based on the switch and OS version.
   // http://crbug.com/230931
   if (base::mac::IsOSLion() &&
       CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kSkipGpuDataLoading)) {
@@ skipping 58 matching lines @@
 
   bool force_compositing = (trial->group() == force_compositing_group);
   bool thread = (trial->group() == thread_group);
   UMA_HISTOGRAM_BOOLEAN("GPU.InForceCompositingModeFieldTrial",
                         force_compositing);
   UMA_HISTOGRAM_BOOLEAN("GPU.InCompositorThreadFieldTrial", thread);
 }
 
 }  // namespace gpu_util