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/tests/ReadPixelsTest.cpp b/tests/ReadPixelsTest.cpp
index 8f1e0d6..d14e989 100644
--- a/tests/ReadPixelsTest.cpp
+++ b/tests/ReadPixelsTest.cpp
@@ -310,8 +310,8 @@
         for (int glCtxType = 0; glCtxType < glCtxTypeCnt; ++glCtxType) {
             SkAutoTUnref<SkBaseDevice> device;
             if (0 == dtype) {
-                device.reset(new SkBitmapDevice(SkBitmap::kARGB_8888_Config,
-                                                DEV_W, DEV_H, false));
+                SkImageInfo info = SkImageInfo::MakeN32Premul(DEV_W, DEV_H);
+                device.reset(SkBitmapDevice::Create(info));
             } else {
 #if SK_SUPPORT_GPU
                 GrContextFactory::GLContextType type =