Consolidate OutputSurface constructors into GL vs Vulkan.

content/renderer/gpu/mailbox_output_surface.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 CONTENT_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_
 #define CONTENT_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <queue>
 
 #include "base/memory/ref_counted.h"
 #include "cc/resources/resource_format.h"
 #include "cc/resources/transferable_resource.h"
 #include "content/renderer/gpu/compositor_output_surface.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace cc {
 class CompositorFrameAck;
+class ContextProvider;
 }
 
 namespace content {
 class FrameSwapMessageQueue;
 
 // Implementation of CompositorOutputSurface that renders to textures which
 // are sent to the browser through the mailbox extension.
 // This class can be created only on the main thread, but then becomes pinned
 // to a fixed thread when bindToClient is called.
 class MailboxOutputSurface : public CompositorOutputSurface {
  public:
   MailboxOutputSurface(
       int32_t routing_id,
       uint32_t output_surface_id,
-      const scoped_refptr<ContextProviderCommandBuffer>& context_provider,
-      const scoped_refptr<ContextProviderCommandBuffer>&
-          worker_context_provider,
-      scoped_refptr<FrameSwapMessageQueue> swap_frame_message_queue,
-      cc::ResourceFormat format);
+      scoped_refptr<cc::ContextProvider> context_provider,
+      scoped_refptr<cc::ContextProvider> worker_context_provider,
+      scoped_refptr<FrameSwapMessageQueue> swap_frame_message_queue);
   ~MailboxOutputSurface() override;
 
   // cc::OutputSurface implementation.
   void DetachFromClient() override;
   void EnsureBackbuffer() override;
   void DiscardBackbuffer() override;
   void Reshape(const gfx::Size& size, float scale_factor, bool alpha) override;
   void BindFramebuffer() override;
   void SwapBuffers(cc::CompositorFrame* frame) override;
 
@@ skipping 15 matching lines @@
     gpu::SyncToken sync_token;
     gfx::Size size;
   };
 
   TransferableFrame current_backing_;
   std::deque<TransferableFrame> pending_textures_;
   std::queue<TransferableFrame> returned_textures_;
 
   uint32_t fbo_;
   bool is_backbuffer_discarded_;
-  cc::ResourceFormat format_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_