Revert of services/ui: Revert CLs that broke Windows.

services/ui/gles2/gpu_memory_tracker.cc

-// Copyright 2015 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 "services/ui/gles2/gpu_memory_tracker.h"
-
-namespace ui {
-
-GpuMemoryTracker::GpuMemoryTracker() {}
-
-void GpuMemoryTracker::TrackMemoryAllocatedChange(
-    size_t old_size,
-    size_t new_size) {}
-
-bool GpuMemoryTracker::EnsureGPUMemoryAvailable(size_t size_needed) {
-  return true;
-}
-
-uint64_t GpuMemoryTracker::ClientTracingId() const {
-  return 0u;
-}
-
-int GpuMemoryTracker::ClientId() const {
-  return 0;
-}
-
-uint64_t GpuMemoryTracker::ShareGroupTracingGUID() const {
-  // TODO(rjkroege): This should return a GUID which identifies the share group
-  // we are tracking memory for. This GUID should correspond to the GUID of the
-  // first command buffer in the share group.
-  return 0;
-}
-
-GpuMemoryTracker::~GpuMemoryTracker() {}
-
-}  // namespace ui