Remove opaque alpha channel special case

third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 446 matching lines @@
 
   DCHECK_GT(frame_buffer_cache_.size(), frame_index);
   ImageFrame& buffer = frame_buffer_cache_[frame_index];
   DCHECK_NE(buffer.GetStatus(), ImageFrame::kFrameComplete);
 
   if (buffer.GetStatus() == ImageFrame::kFrameEmpty) {
     if (!buffer.AllocatePixelData(Size().Width(), Size().Height(),
                                   ColorSpaceForSkImages()))
       return SetFailed();
     buffer.ZeroFillPixelData();
-    buffer.SetStatus(ImageFrame::kFramePartial);
     // The buffer is transparent outside the decoded area while the image is
     // loading. The correct alpha value for the frame will be set when it is
     // fully decoded.
-    buffer.SetHasAlpha(true);
+    buffer.SetStatus(ImageFrame::kFramePartial);
     buffer.SetOriginalFrameRect(IntRect(IntPoint(), Size()));
   }
 
   const IntRect& frame_rect = buffer.OriginalFrameRect();
   if (!decoder_) {
     WEBP_CSP_MODE mode = outputMode(format_flags_ & ALPHA_FLAG);
     if (!premultiply_alpha_)
       mode = outputMode(false);
     if (ColorTransform()) {
       // Swizzling between RGBA and BGRA is zero cost in a color transform.
@@ skipping 34 matching lines @@
         return false;
       }
     // FALLTHROUGH
     default:
       Clear();
       return SetFailed();
   }
 }
 
 }  // namespace blink