use SkColorType instead of SkBitmap::Config in samplecode

BUG=skia:
R=reed@google.com

Author: reed@chromium.org

Review URL: https://codereview.chromium.org/169063002

git-svn-id: http://skia.googlecode.com/svn/trunk@13473 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleText.cpp b/samplecode/SampleText.cpp
index 7e98171..c1aca63 100644
--- a/samplecode/SampleText.cpp
+++ b/samplecode/SampleText.cpp
@@ -273,8 +273,8 @@
     }
 
     static void make_textstrip(SkBitmap* bm) {
-        bm->setConfig(SkBitmap::kRGB_565_Config, 200, 18);
-        bm->allocPixels();
+        bm->allocPixels(SkImageInfo::Make(200, 18, kRGB_565_SkColorType,
+                                          kOpaque_SkAlphaType));
         bm->eraseColor(SK_ColorWHITE);
 
         SkCanvas    canvas(*bm);