Revert of Rename kPMColor_SkColorType to kN32_SkColorType. (https://codereview.chromium.org/227433009/)

Reason for revert:
Chrome's side of define changes not easy to figure out quickly. Reverting this for DEPS roll for now.

Original issue's description:
> Rename kPMColor_SkColorType to kN32_SkColorType.
>
> The new name better represents what this flag means.
>
> BUG=skia:2384
>
> Committed: http://code.google.com/p/skia/source/detail?r=14117

R=reed@google.com, scroggo@google.com
TBR=reed@google.com, scroggo@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:2384

Author: bensong@google.com

Review URL: https://codereview.chromium.org/234833003

git-svn-id: http://skia.googlecode.com/svn/trunk@14149 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/BitmapTest.cpp b/tests/BitmapTest.cpp
index dce1069..0167d52 100644
--- a/tests/BitmapTest.cpp
+++ b/tests/BitmapTest.cpp
@@ -25,7 +25,7 @@
     // TODO: perhaps skia can relax this, and only require that rowBytes fit
     //       in a uint32_t (or larger), but for now this is the constraint.
 
-    info.fColorType = kN32_SkColorType;
+    info.fColorType = kPMColor_SkColorType;
     REPORTER_ASSERT(reporter, !bm.setConfig(info));
 }