GIF decoding to Index8, unit tests and misusing unit test as benchmark

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

Index: third_party/WebKit/Source/platform/graphics/DecodingImageGenerator.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/DecodingImageGenerator.cpp b/third_party/WebKit/Source/platform/graphics/DecodingImageGenerator.cpp
index afc8818abafa95723c4c0ecb54651a91fea80c50..274cbb2adbcc4ac4cfbfea5b7c049e00f2aabf1a 100644
--- a/third_party/WebKit/Source/platform/graphics/DecodingImageGenerator.cpp
+++ b/third_party/WebKit/Source/platform/graphics/DecodingImageGenerator.cpp
@@ -70,7 +70,7 @@ bool DecodingImageGenerator::onGetPixels(const SkImageInfo& info, void* pixels,
     }
 
     PlatformInstrumentation::willDecodeLazyPixelRef(m_generationId);
-    bool decoded = m_frameGenerator->decodeAndScale(getInfo(), m_frameIndex, pixels, rowBytes);
+    bool decoded = m_frameGenerator->decodeAndScale(info, m_frameIndex, pixels, rowBytes, table, tableCount);
     PlatformInstrumentation::didDecodeLazyPixelRef();
 
     return decoded;
@@ -113,7 +113,9 @@ SkImageGenerator* DecodingImageGenerator::create(SkData* data)
         return 0;
 
     const IntSize size = decoder->size();
-    const SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
+    const SkImageInfo info = decoder->canDecodeTo(0, ImageFrame::Index8)
+        ? SkImageInfo::Make(size.width(), size.height(), kIndex_8_SkColorType, kPremul_SkAlphaType)
+        : SkImageInfo::MakeN32Premul(size.width(), size.height());
 
     RefPtr<ImageFrameGenerator> frame = ImageFrameGenerator::create(SkISize::Make(size.width(), size.height()), buffer, true, false);
     if (!frame)