cc: Remove the software compositing bool from PrepareTextureMailbox

ui/compositor/layer.h

 // Copyright (c) 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.
 
 #ifndef UI_COMPOSITOR_LAYER_H_
 #define UI_COMPOSITOR_LAYER_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 357 matching lines @@
   scoped_refptr<cc::DisplayItemList> PaintContentsToDisplayList(
       ContentLayerClient::PaintingControlSetting painting_control) override;
   bool FillsBoundsCompletely() const override;
   size_t GetApproximateUnsharedMemoryUsage() const override;
 
   cc::Layer* cc_layer_for_testing() { return cc_layer_; }
 
   // TextureLayerClient
   bool PrepareTextureMailbox(
       cc::TextureMailbox* mailbox,
-      std::unique_ptr<cc::SingleReleaseCallback>* release_callback,
-      bool use_shared_memory) override;
+      std::unique_ptr<cc::SingleReleaseCallback>* release_callback) override;
 
   float device_scale_factor() const { return device_scale_factor_; }
 
   // LayerClient
   std::unique_ptr<base::trace_event::ConvertableToTraceFormat> TakeDebugInfo(
       cc::Layer* layer) override;
   void didUpdateMainThreadScrollingReasons() override;
 
   // Whether this layer has animations waiting to get sent to its cc::Layer.
   bool HasPendingThreadedAnimationsForTesting() const;
@@ skipping 151 matching lines @@
   // The texture scale.
   float texture_x_scale_;
   float texture_y_scale_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_LAYER_H_