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/effects/gradients/SkGradientShader.cpp b/src/effects/gradients/SkGradientShader.cpp
index 038044d..ada9859 100644
--- a/src/effects/gradients/SkGradientShader.cpp
+++ b/src/effects/gradients/SkGradientShader.cpp
@@ -619,7 +619,7 @@
     if (!gCache->find(storage.get(), size, bitmap)) {
         // force our cahce32pixelref to be built
         (void)cache->getCache32();
-        bitmap->setInfo(SkImageInfo::MakeN32Premul(kCache32Count, 1));
+        bitmap->setConfig(SkImageInfo::MakeN32Premul(kCache32Count, 1));
         bitmap->setPixelRef(cache->getCache32PixelRef());
 
         gCache->add(storage.get(), size, *bitmap);