Change device factories to take SkImageInfo instead of SkBitmap::Config

patch from issue 167033002

BUG=skia:
R=reed@google.com

Author: reed@chromium.org

Review URL: https://codereview.chromium.org/168653002

git-svn-id: http://skia.googlecode.com/svn/trunk@13463 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/dm/DMUtil.cpp b/dm/DMUtil.cpp
index 52efda3..849d1bf 100644
--- a/dm/DMUtil.cpp
+++ b/dm/DMUtil.cpp
@@ -19,10 +19,10 @@
     picture->endRecording();
 }
 
-void SetupBitmap(const SkBitmap::Config config, skiagm::GM* gm, SkBitmap* bitmap) {
+void SetupBitmap(const SkColorType ct, skiagm::GM* gm, SkBitmap* bitmap) {
     const SkISize size = gm->getISize();
-    bitmap->setConfig(config, size.width(), size.height());
-    bitmap->allocPixels();
+    bitmap->allocPixels(SkImageInfo::Make(size.width(), size.height(),
+                                          ct, kPremul_SkAlphaType));
     bitmap->eraseColor(0x00000000);
 }