Remove bitmap reuse from SkImageDecoder.

src/images/SkImageDecoder_libgif.cpp

Index: src/images/SkImageDecoder_libgif.cpp
diff --git a/src/images/SkImageDecoder_libgif.cpp b/src/images/SkImageDecoder_libgif.cpp
index f6c54c2dc0fa8016fe1444ff48833ce454ca9da6..d368eccd92d629537ae7b8cedf68b1dc29d81970 100644
--- a/src/images/SkImageDecoder_libgif.cpp
+++ b/src/images/SkImageDecoder_libgif.cpp
@@ -202,17 +202,11 @@ bool SkGIFImageDecoder::onDecode(SkStream* sk_stream, SkBitmap* bm, Mode mode) {
                 return error_return(gif, *bm, "chooseFromOneChoice");
             }
 
+            bm->setConfig(SkBitmap::kIndex8_Config, width, height);
             if (SkImageDecoder::kDecodeBounds_Mode == mode) {
-                bm->setConfig(SkBitmap::kIndex8_Config, width, height);
                 return true;
             }
 
-            // No Bitmap reuse supported for this format
-            if (!bm->isNull()) {
-                return false;
-            }
-
-            bm->setConfig(SkBitmap::kIndex8_Config, width, height);
             SavedImage* image = &gif->SavedImages[gif->ImageCount-1];
             const GifImageDesc& desc = image->ImageDesc;