Delete reallyHasAlpha() from SkCodec

TBR=reed
BUG=skia:3582
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1557403002

Review URL: https://codereview.chromium.org/1557403002

1 files changed, 0 insertions, 22 deletions

diff --git a/include/codec/SkCodec.h b/include/codec/SkCodec.h
index d06c2c3399..597ebd039e 100644
--- a/include/codec/SkCodec.h
+++ b/include/codec/SkCodec.h
@@ -278,18 +278,6 @@ public:
     Result getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes);
 
     /**
-     *  Some images may initially report that they have alpha due to the format
-     *  of the encoded data, but then never use any colors which have alpha
-     *  less than 100%. This function can be called *after* decoding to
-     *  determine if such an image truly had alpha. Calling it before decoding
-     *  is undefined.
-     *  FIXME: see skbug.com/3582.
-     */
-    bool reallyHasAlpha() const {
-        return kOpaque_SkAlphaType != this->getInfo().alphaType() && this->onReallyHasAlpha();
-    }
-
-    /**
      * The remaining functions revolve around decoding scanlines.
      */
 
@@ -487,16 +475,6 @@ protected:
     }
 
     /**
-     * This is only called if the image indicates that it is not opaque.
-     * By default we will assume that the image is in fact non-opaque.
-     * Subclasses may override this function if they intend to verify
-     * that the image actually has alpha.
-     */
-    virtual bool onReallyHasAlpha() const {
-        return true;
-    }
-
-    /**
      *  If the stream was previously read, attempt to rewind.
      *
      *  If the stream needed to be rewound, call onRewind.