Remove unneeded abstractions and simplify RecordingImageBufferSurface

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

 /*
  * Copyright (c) 2008, Google Inc. All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 507 matching lines @@
     DCHECK_GT(global_accelerated_image_buffer_count_, 0u);
     global_accelerated_image_buffer_count_--;
     global_gpu_memory_usage_ -= gpu_memory_usage_;
     gpu_memory_usage_ = 0;
 
     if (client_)
       client_->DidDisableAcceleration();
   }
 }
 
-namespace {
-
-class UnacceleratedSurfaceFactory
-    : public RecordingImageBufferFallbackSurfaceFactory {
- public:
-  virtual std::unique_ptr<ImageBufferSurface> CreateSurface(
-      const IntSize& size,
-      OpacityMode opacity_mode,
-      const CanvasColorParams& color_params) {
-    return WTF::WrapUnique(new UnacceleratedImageBufferSurface(
-        size, opacity_mode, kInitializeImagePixels, color_params));
-  }
-
-  virtual ~UnacceleratedSurfaceFactory() {}
-};
-
-}  // namespace
-
 void ImageBuffer::DisableAcceleration() {
   if (!IsAccelerated())
     return;
 
   // Create and configure a recording (unaccelerated) surface.
-  std::unique_ptr<RecordingImageBufferFallbackSurfaceFactory> surface_factory =
-      WTF::MakeUnique<UnacceleratedSurfaceFactory>();
   std::unique_ptr<ImageBufferSurface> surface =
       WTF::WrapUnique(new RecordingImageBufferSurface(
-          surface_->size(), std::move(surface_factory),
-          surface_->GetOpacityMode(), surface_->color_params()));
+          surface_->size(), surface_->GetOpacityMode(),
+          surface_->color_params()));
   SetSurface(std::move(surface));
 }
 
 void ImageBuffer::SetSurface(std::unique_ptr<ImageBufferSurface> surface) {
   sk_sp<SkImage> image =
       surface_->NewImageSnapshot(kPreferNoAcceleration, kSnapshotReasonPaint);
 
   // image can be null if alloaction failed in which case we should just
   // abort the surface switch to reatain the old surface which is still
   // functional.
@@ skipping 50 matching lines @@
   DCHECK(MIMETypeRegistry::IsSupportedImageMIMETypeForEncoding(mime_type));
 
   Vector<unsigned char> result;
   if (!EncodeImage(mime_type, quality, &result))
     return "data:,";
 
   return "data:" + mime_type + ";base64," + Base64Encode(result);
 }
 
 }  // namespace blink