Remove parts of //cc we aren't using

cc/layers/io_surface_layer.cc

Index: cc/layers/io_surface_layer.cc
diff --git a/cc/layers/io_surface_layer.cc b/cc/layers/io_surface_layer.cc
deleted file mode 100644
index 05d5fb90f0414a137040d5035ce4bf690cf67fbc..0000000000000000000000000000000000000000
--- a/cc/layers/io_surface_layer.cc
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright 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.
-
-#include "cc/layers/io_surface_layer.h"
-
-#include "cc/layers/io_surface_layer_impl.h"
-
-namespace cc {
-
-scoped_refptr<IOSurfaceLayer> IOSurfaceLayer::Create() {
-  return make_scoped_refptr(new IOSurfaceLayer());
-}
-
-IOSurfaceLayer::IOSurfaceLayer() : Layer(), io_surface_id_(0) {}
-
-IOSurfaceLayer::~IOSurfaceLayer() {}
-
-void IOSurfaceLayer::SetIOSurfaceProperties(uint32_t io_surface_id,
-                                            const gfx::Size& size) {
-  io_surface_id_ = io_surface_id;
-  io_surface_size_ = size;
-  UpdateDrawsContent(HasDrawableContent());
-  SetNeedsCommit();
-}
-
-scoped_ptr<LayerImpl> IOSurfaceLayer::CreateLayerImpl(
-    LayerTreeImpl* tree_impl) {
-  return IOSurfaceLayerImpl::Create(tree_impl, layer_id_);
-}
-
-bool IOSurfaceLayer::HasDrawableContent() const {
-  return io_surface_id_ && Layer::HasDrawableContent();
-}
-
-void IOSurfaceLayer::PushPropertiesTo(LayerImpl* layer) {
-  Layer::PushPropertiesTo(layer);
-
-  IOSurfaceLayerImpl* io_surface_layer =
-      static_cast<IOSurfaceLayerImpl*>(layer);
-  io_surface_layer->SetIOSurfaceProperties(io_surface_id_, io_surface_size_);
-}
-
-bool IOSurfaceLayer::Update(ResourceUpdateQueue* queue,
-                            const OcclusionTracker<Layer>* occlusion) {
-  bool updated = Layer::Update(queue, occlusion);
-
-  // This layer doesn't update any resources from the main thread side,
-  // but repaint rects need to be sent to the layer impl via commit.
-  return updated || !update_rect_.IsEmpty();
-}
-
-}  // namespace cc