cc: De-special-case SurfaceLayer code

third_party/WebKit/Source/platform/graphics/CanvasSurfaceLayerBridge.cpp

 // Copyright 2016 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 "platform/graphics/CanvasSurfaceLayerBridge.h"
 
 #include "cc/layers/layer.h"
 #include "cc/layers/solid_color_layer.h"
 #include "cc/layers/surface_layer.h"
 #include "cc/surfaces/sequence_surface_reference_factory.h"
@@ skipping 83 matching lines @@
     const cc::SurfaceInfo& surface_info) {
   if (!current_surface_id_.is_valid() && surface_info.is_valid()) {
     // First time a SurfaceId is received
     current_surface_id_ = surface_info.id();
     GraphicsLayer::UnregisterContentsLayer(web_layer_.get());
     web_layer_->RemoveFromParent();
 
     scoped_refptr<cc::SurfaceLayer> surface_layer =
         cc::SurfaceLayer::Create(ref_factory_);
     surface_layer->SetPrimarySurfaceInfo(surface_info);
+    surface_layer->SetFallbackSurfaceInfo(surface_info);
     surface_layer->SetStretchContentToFillBounds(true);
     cc_layer_ = surface_layer;
 
     web_layer_ =
         Platform::Current()->CompositorSupport()->CreateLayerFromCCLayer(
             cc_layer_.get());
     GraphicsLayer::RegisterContentsLayer(web_layer_.get());
   } else if (current_surface_id_ != surface_info.id()) {
     // A different SurfaceId is received, prompting change to existing
     // SurfaceLayer
     current_surface_id_ = surface_info.id();
     cc::SurfaceLayer* surface_layer =
         static_cast<cc::SurfaceLayer*>(cc_layer_.get());
     surface_layer->SetPrimarySurfaceInfo(surface_info);
+    surface_layer->SetFallbackSurfaceInfo(surface_info);
   }
 
   observer_->OnWebLayerReplaced();
   cc_layer_->SetBounds(surface_info.size_in_pixels());
 }
 
 void CanvasSurfaceLayerBridge::SatisfyCallback(
     const cc::SurfaceSequence& sequence) {
   service_->Satisfy(sequence);
 }
 
 void CanvasSurfaceLayerBridge::RequireCallback(
     const cc::SurfaceId& surface_id,
     const cc::SurfaceSequence& sequence) {
   service_->Require(surface_id, sequence);
 }
 
 }  // namespace blink