Rename kPMColor_SkColorType to kN32_SkColorType.

The new name better represents what this flag means.

BUG=skia:2384
R=reed@google.com

Author: scroggo@google.com

Review URL: https://codereview.chromium.org/227433009

git-svn-id: http://skia.googlecode.com/svn/trunk@14117 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleTiling.cpp b/samplecode/SampleTiling.cpp
index 735b990..9ffcceb 100644
--- a/samplecode/SampleTiling.cpp
+++ b/samplecode/SampleTiling.cpp
@@ -55,7 +55,7 @@
 }
 
 static const SkColorType gColorTypes[] = {
-    kPMColor_SkColorType,
+    kN32_SkColorType,
     kRGB_565_SkColorType,
 };
 static const int gWidth = 32;