Fix "unreachable code" warnings (MSVC warning 4702), misc. edition.

gpu/config/gpu_info_collector_win.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 "gpu/config/gpu_info_collector.h"
 
 // This has to be included before windows.h.
 #include "third_party/re2/re2/re2.h"
 
 #include <windows.h>
@@ skipping 192 matching lines @@
     return false;
 
   return true;
 }
 
 // Determines whether D3D11 won't work, either because it is not supported on
 // the machine or because it is known it is likely to crash.
 bool D3D11ShouldWork(const GPUInfo& gpu_info) {
   // TODO(apatrick): This is a temporary change to see what impact disabling
   // D3D11 stats collection has on Canary.
+#if 1
   return false;
-
+#else
   // Windows XP never supports D3D11. It seems to be less stable that D3D9 on
   // Vista.
   if (base::win::GetVersion() <= base::win::VERSION_VISTA)
     return false;
 
   // http://crbug.com/175525.
   if (gpu_info.display_link_version.IsValid())
     return false;
 
   return true;
+#endif
 }
 
 // Collects information about the level of D3D11 support and records it in
 // the UMA stats. Records no stats when D3D11 in not supported at all.
 void CollectD3D11SupportOnWorkerThread() {
   TRACE_EVENT0("gpu", "CollectD3D11Support");
 
   typedef HRESULT (WINAPI *D3D11CreateDeviceFunc)(
       IDXGIAdapter* adapter,
       D3D_DRIVER_TYPE driver_type,
@@ skipping 409 matching lines @@
     basic_gpu_info->software_rendering = true;
     return;
   }
 
   MergeGPUInfoGL(basic_gpu_info, context_gpu_info);
 
   basic_gpu_info->dx_diagnostics = context_gpu_info.dx_diagnostics;
 }
 
 }  // namespace gpu