Re-land: content: Enable impl-side painting on Windows.

content/browser/gpu/compositor_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 "content/browser/gpu/compositor_util.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "build/build_config.h"
@@ skipping 186 matching lines @@
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 
   if (command_line.HasSwitch(switches::kDisableImplSidePainting))
     return false;
   else if (command_line.HasSwitch(switches::kEnableImplSidePainting))
     return true;
   else if (command_line.HasSwitch(
       switches::kEnableBleedingEdgeRenderingFastPaths))
     return true;
 
-#if defined(OS_MACOSX) || defined(OS_WIN)
+#if defined(OS_MACOSX)
   return false;
 #else
   return true;
 #endif
 }
 
 bool IsGpuRasterizationEnabled() {
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 
   if (!IsImplSidePaintingEnabled())
@@ skipping 112 matching lines @@
   return problem_list;
 }
 
 base::Value* GetDriverBugWorkarounds() {
   base::ListValue* workaround_list = new base::ListValue();
   GpuDataManagerImpl::GetInstance()->GetDriverBugWorkarounds(workaround_list);
   return workaround_list;
 }
 
 }  // namespace content