Implement Fill() for incomplete decodes to RGBA_F16

src/codec/SkSampler.h

Index: src/codec/SkSampler.h
diff --git a/src/codec/SkSampler.h b/src/codec/SkSampler.h
index 73e11c986e2949981a4f215678582fdfce060e8c..b233c32be22942577fb4502c7e722662417c2b82 100644
--- a/src/codec/SkSampler.h
+++ b/src/codec/SkSampler.h
@@ -35,6 +35,7 @@ public:
      * Stride in bytes of the destination.
      *
      * @param colorOrIndex
+     * If colorType is kF16, colorOrIndex is treated as a 64-bit color.
      * If colorType is kN32, colorOrIndex is treated as a 32-bit color.
      * If colorType is k565, colorOrIndex is treated as a 16-bit color.
      * If colorType is kGray, colorOrIndex is treated as an 8-bit color.
@@ -46,13 +47,13 @@ public:
      *
      */
     static void Fill(const SkImageInfo& info, void* dst, size_t rowBytes,
-            uint32_t colorOrIndex, SkCodec::ZeroInitialized zeroInit);
+            uint64_t colorOrIndex, SkCodec::ZeroInitialized zeroInit);
 
     /**
      * Allow subclasses to implement unique versions of fill().
      */
     virtual void fill(const SkImageInfo& info, void* dst, size_t rowBytes,
-            uint32_t colorOrIndex, SkCodec::ZeroInitialized zeroInit) {}
+            uint64_t colorOrIndex, SkCodec::ZeroInitialized zeroInit) {}
 
     virtual ~SkSampler() {}
 private: