Replace LayerImpl::sorting_context_id with transform reference.

cc/layers/video_layer_impl.cc

 // Copyright 2011 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/video_layer_impl.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 152 matching lines @@
       transform.Rotate(270.0);
       transform.Translate(-rotated_size.width(), 0);
     case media::VIDEO_ROTATION_0:
       break;
   }
 
   SharedQuadState* shared_quad_state =
       render_pass->CreateAndAppendSharedQuadState();
   shared_quad_state->SetAll(transform, rotated_size, visible_layer_rect(),
                             clip_rect(), is_clipped(), draw_opacity(),
-                            draw_blend_mode(), sorting_context_id());
+                            draw_blend_mode(), GetSortingContextId());
 
   AppendDebugBorderQuad(
       render_pass, rotated_size, shared_quad_state, append_quads_data);
 
   gfx::Rect quad_rect(rotated_size);
   gfx::Rect opaque_rect(contents_opaque() ? quad_rect : gfx::Rect());
   gfx::Rect visible_rect = frame_->visible_rect();
   gfx::Size coded_size = frame_->coded_size();
 
   Occlusion occlusion_in_video_space =
@@ skipping 188 matching lines @@
 void VideoLayerImpl::SetNeedsRedraw() {
   SetUpdateRect(gfx::UnionRects(update_rect(), gfx::Rect(bounds())));
   layer_tree_impl()->SetNeedsRedraw();
 }
 
 const char* VideoLayerImpl::LayerTypeAsString() const {
   return "cc::VideoLayerImpl";
 }
 
 }  // namespace cc