ui: Remove SurfaceTexture GpuMemoryBuffer type.

ui/gfx/mojo/buffer_types.mojom

 // 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.
 
 module gfx.mojom;
 
 // gfx::BufferFormat
 enum BufferFormat {
   ATC,
   ATCIA,
@@ skipping 22 matching lines @@
   GPU_READ_CPU_READ_WRITE_PERSISTENT,
 
   LAST = GPU_READ_CPU_READ_WRITE_PERSISTENT
 };
 
 // gfx::GpuMemoryBufferType
 enum GpuMemoryBufferType {
   EMPTY_BUFFER,
   SHARED_MEMORY_BUFFER,
   IO_SURFACE_BUFFER,
-  SURFACE_TEXTURE_BUFFER,
   OZONE_NATIVE_PIXMAP,
   LAST = OZONE_NATIVE_PIXMAP
 };
 
 // gfx::GpuMemoryBufferId
 struct GpuMemoryBufferId {
   int32 id;
 };
 
 // gfx::NativePixmapPlane
@@ skipping 14 matching lines @@
 // gfx::GpuMemoryBufferHandle
 struct GpuMemoryBufferHandle {
   GpuMemoryBufferType type;
   GpuMemoryBufferId id;
   handle shared_memory_handle;
   uint32 offset;
   uint32 stride;
   NativePixmapHandle? native_pixmap_handle;
   // TODO: Add support for mach_port on mac.
 };