gpu: Delete unnecessary code.

gpu/ipc/common/gpu_memory_buffer_support.cc

 // Copyright 2016 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/ipc/common/gpu_memory_buffer_support.h"
 
 #include "base/logging.h"
 #include "build/build_config.h"
 
 #if defined(USE_OZONE)
@@ skipping 10 matching lines @@
   return gfx::SURFACE_TEXTURE_BUFFER;
 #endif
 #if defined(USE_OZONE)
   return gfx::OZONE_NATIVE_PIXMAP;
 #endif
   return gfx::EMPTY_BUFFER;
 }
 
 bool IsNativeGpuMemoryBufferConfigurationSupported(gfx::BufferFormat format,
                                                    gfx::BufferUsage usage) {
+  DCHECK_NE(gfx::SHARED_MEMORY_BUFFER, GetNativeGpuMemoryBufferType());
+  DCHECK_NE(gfx::EMPTY_BUFFER, GetNativeGpuMemoryBufferType());
 #if defined(OS_MACOSX)
   switch (usage) {
     case gfx::BufferUsage::GPU_READ:
     case gfx::BufferUsage::SCANOUT:
       return format == gfx::BufferFormat::BGRA_8888 ||
              format == gfx::BufferFormat::RGBA_8888 ||
              format == gfx::BufferFormat::BGRX_8888;
     case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE:
     case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE_PERSISTENT:
       return format == gfx::BufferFormat::R_8 ||
@@ skipping 25 matching lines @@
   }
   return ui::ClientNativePixmapFactory::GetInstance()->IsConfigurationSupported(
       format, usage);
 #endif
 
   NOTREACHED();
   return false;
 }
 
 }  // namespace gpu