Don't free non-tile resources on GPU rasterization toggle

cc/layers/picture_layer_impl.cc

 // 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/picture_layer_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 652 matching lines @@
   raster_source_->DidBeginTracing();
 }
 
 void PictureLayerImpl::ReleaseResources() {
   // Recreate tilings with new settings, since some of those might change when
   // we release resources.
   tilings_ = nullptr;
   ResetRasterScale();
 }
 
-void PictureLayerImpl::RecreateResources() {
+void PictureLayerImpl::ReleaseTileResources() {
+  // All resources are tile resources.
+  ReleaseResources();
+}
+
+void PictureLayerImpl::RecreateTileResources() {
   tilings_ = CreatePictureLayerTilingSet();
   if (raster_source_) {
     raster_source_->set_image_decode_controller(
         layer_tree_impl()->image_decode_controller());
   }
 }
 
 Region PictureLayerImpl::GetInvalidationRegionForDebugging() {
   // |invalidation_| gives the invalidation contained in the source frame, but
   // is not cleared after drawing from the layer. However, update_rect() is
@@ skipping 651 matching lines @@
 bool PictureLayerImpl::IsOnActiveOrPendingTree() const {
   return !layer_tree_impl()->IsRecycleTree();
 }
 
 bool PictureLayerImpl::HasValidTilePriorities() const {
   return IsOnActiveOrPendingTree() &&
          is_drawn_render_surface_layer_list_member();
 }
 
 }  // namespace cc