Remove opaque alpha channel special case

third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoderTest.cpp

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 373 matching lines @@
   ASSERT_TRUE(unpremulDecoder->frameCount());
   ImageFrame* premulFrame = premulDecoder->frameBufferAtIndex(0);
   EXPECT_TRUE(premulFrame &&
               premulFrame->getStatus() != ImageFrame::FrameComplete);
   EXPECT_EQ(premulFrame->bitmap().alphaType(), kPremul_SkAlphaType);
   ImageFrame* unpremulFrame = unpremulDecoder->frameBufferAtIndex(0);
   EXPECT_TRUE(unpremulFrame &&
               unpremulFrame->getStatus() != ImageFrame::FrameComplete);
   EXPECT_EQ(unpremulFrame->bitmap().alphaType(), kUnpremul_SkAlphaType);
 
-  // Fully decoded frame => the frame alpha type is known (opaque).
+  // Fully decoded frame
   premulDecoder->setData(fullData.get(), true);
   ASSERT_TRUE(premulDecoder->frameCount());
   unpremulDecoder->setData(fullData.get(), true);
   ASSERT_TRUE(unpremulDecoder->frameCount());
   premulFrame = premulDecoder->frameBufferAtIndex(0);
   EXPECT_TRUE(premulFrame &&
               premulFrame->getStatus() == ImageFrame::FrameComplete);
   EXPECT_EQ(premulFrame->bitmap().alphaType(), kOpaque_SkAlphaType);
   unpremulFrame = unpremulDecoder->frameBufferAtIndex(0);
   EXPECT_TRUE(unpremulFrame &&
@@ skipping 25 matching lines @@
   EXPECT_EQ(1u, decoder->frameCount());
   ImageFrame* frame = decoder->frameBufferAtIndex(0);
   decoder->setMemoryAllocator(nullptr);
 
   ASSERT_TRUE(frame);
   EXPECT_EQ(IntRect(IntPoint(), decoder->size()), frame->originalFrameRect());
   EXPECT_FALSE(frame->hasAlpha());
 }
 
 }  // namespace blink