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/src/utils/SkBitmapHasher.cpp b/src/utils/SkBitmapHasher.cpp
index 6c861cd..bd038dd 100644
--- a/src/utils/SkBitmapHasher.cpp
+++ b/src/utils/SkBitmapHasher.cpp
@@ -57,7 +57,7 @@
     // Hmm, that didn't work. Maybe if we create a new
     // kARGB_8888_Config version of the bitmap it will work better?
     SkBitmap copyBitmap;
-    if (!bitmap.copyTo(&copyBitmap, kPMColor_SkColorType)) {
+    if (!bitmap.copyTo(&copyBitmap, kN32_SkColorType)) {
         return false;
     }
     return ComputeDigestInternal(copyBitmap, result);