Remove //gpu/{blink,ipc}, gyp files, DEPS files

gpu/gpu_ipc.gypi

-# 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.
-
-{
-  'dependencies': [
-    '../ipc/ipc.gyp:ipc',
-    '../third_party/khronos/khronos.gyp:khronos_headers',
-  ],
-  'include_dirs': [
-    '..',
-  ],
-  'sources': [
-    'ipc/gpu_command_buffer_traits.cc',
-    'ipc/gpu_command_buffer_traits.h',
-  ],
-  'conditions': [
-    # This section applies to gpu_ipc_win64, used by the NaCl Win64 helper
-    # (nacl64.exe).
-    ['nacl_win64_target==1', {
-      # gpu_ipc_win64 must only link against the 64-bit ipc target.
-      'dependencies!': [
-        '../ipc/ipc.gyp:ipc',
-      ],
-    }],
-  ],
-}