Allow RecordingImageBufferSurface to prevent fallback.

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 514 matching lines @@
   }
 }
 
 void ImageBuffer::DisableAcceleration() {
   if (!IsAccelerated())
     return;
 
   // Create and configure a recording (unaccelerated) surface.
   std::unique_ptr<ImageBufferSurface> surface =
       WTF::WrapUnique(new RecordingImageBufferSurface(
-          surface_->size(), surface_->GetOpacityMode(),
-          surface_->color_params()));
+          surface_->size(), RecordingImageBufferSurface::kAllowFallback,
+          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