Revert of setConfig -> setInfo (https://codereview.chromium.org/308683005/)

Reason for revert:
broke all Windows bots

Original issue's description:
> setConfig -> setInfo
>
> BUG=skia:
>
> Committed: http://code.google.com/p/skia/source/detail?r=14978

R=robertphillips@google.com, reed@google.com
TBR=reed@google.com, robertphillips@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Author: epoger@google.com

Review URL: https://codereview.chromium.org/302053002

git-svn-id: http://skia.googlecode.com/svn/trunk@14979 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/images/SkImageDecoder_libwebp.cpp b/src/images/SkImageDecoder_libwebp.cpp
index 353eabf..0299025 100644
--- a/src/images/SkImageDecoder_libwebp.cpp
+++ b/src/images/SkImageDecoder_libwebp.cpp
@@ -311,7 +311,7 @@
     } else {
         info.fAlphaType = kOpaque_SkAlphaType;
     }
-    return decodedBitmap->setInfo(info);
+    return decodedBitmap->setConfig(info);
 }
 
 bool SkWEBPImageDecoder::onBuildTileIndex(SkStreamRewindable* stream,