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