services/ui: Remove deprecated gpu code

services/ui/common/gpu_service.cc

Index: services/ui/common/gpu_service.cc
diff --git a/services/ui/common/gpu_service.cc b/services/ui/common/gpu_service.cc
index 955035a5aecc99aeece3c1b6e61409b49a0a18c7..f8bf9e79e0939d11ced35b5e1313616fe85c0011 100644
--- a/services/ui/common/gpu_service.cc
+++ b/services/ui/common/gpu_service.cc
@@ -52,18 +52,6 @@ GpuService::~GpuService() {
 }
 
 // static
-bool GpuService::UseChromeGpuCommandBuffer() {
-// TODO(penghuang): Kludge: Running with Chrome GPU command buffer by default
-// breaks unit tests on Windows
-#if defined(OS_WIN)
-  return false;
-#else
-  return !base::CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kUseMojoGpuCommandBufferInMus);
-#endif
-}
-
-// static
 void GpuService::Initialize(shell::Connector* connector) {
   DCHECK(!g_gpu_service);
   g_gpu_service = new GpuService(connector);