gfx: Clean up ClientNativePixmapFactory interface

This is a pure interface so it can inline the dtor and doesn't need to
hide the ctor.

Bug: none
Test: compile
Change-Id: Idbf3cd3ca8397b3c0883f5e7759151ff9d29ab55
Reviewed-on: https://chromium-review.googlesource.com/c/1283476
Commit-Queue: Michael Spang <spang@chromium.org>
Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600970}

ui/gfx/BUILD.gn

@@ -492,7 +492,6 @@ jumbo_source_set("memory_buffer_sources") {
     "ca_layer_params.cc",
     "ca_layer_params.h",
     "client_native_pixmap.h",
-    "client_native_pixmap_factory.cc",
     "client_native_pixmap_factory.h",
     "generic_shared_memory_id.cc",
     "generic_shared_memory_id.h",

ui/gfx/client_native_pixmap_factory.cc

-// Copyright 2015 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 "ui/gfx/client_native_pixmap_factory.h"
-
-namespace gfx {
-
-ClientNativePixmapFactory::ClientNativePixmapFactory() {}
-
-ClientNativePixmapFactory::~ClientNativePixmapFactory() {}
-
-}  // namespace gfx

ui/gfx/client_native_pixmap_factory.h

@@ -23,25 +23,18 @@ class Size;
 // provide a client pixmap for non-GPU processes.
 class GFX_EXPORT ClientNativePixmapFactory {
  public:
-  virtual ~ClientNativePixmapFactory();
+  virtual ~ClientNativePixmapFactory() {}
 
   // Returns true if format/usage configuration is supported.
   virtual bool IsConfigurationSupported(gfx::BufferFormat format,
                                         gfx::BufferUsage usage) const = 0;
 
-  // TODO(dshwang): implement it. crbug.com/475633
   // Import the native pixmap from |handle| to be used in non-GPU processes.
   // This function takes ownership of any file descriptors in |handle|.
   virtual std::unique_ptr<ClientNativePixmap> ImportFromHandle(
       const gfx::NativePixmapHandle& handle,
       const gfx::Size& size,
       gfx::BufferUsage usage) = 0;
-
- protected:
-  ClientNativePixmapFactory();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ClientNativePixmapFactory);
 };
 
 }  // namespace gfx