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/dm/DM.cpp b/dm/DM.cpp
index ef5c0f6..a8a2b6d 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -88,7 +88,7 @@
     for (int i = 0; i < gms.count(); i++) {
         for (int j = 0; j < configs.count(); j++) {
             START("565",      CpuGMTask, kRGB_565_SkColorType);
-            START("8888",     CpuGMTask, kN32_SkColorType);
+            START("8888",     CpuGMTask, kPMColor_SkColorType);
             START("gpu",      GpuGMTask, native, 0);
             START("msaa4",    GpuGMTask, native, 4);
             START("msaa16",   GpuGMTask, native, 16);
@@ -115,7 +115,7 @@
         for (int j = 0; j < configs.count(); j++) {
             START("nonrendering", NonRenderingBenchTask);
             START("565",          CpuBenchTask, kRGB_565_SkColorType);
-            START("8888",         CpuBenchTask, kN32_SkColorType);
+            START("8888",         CpuBenchTask, kPMColor_SkColorType);
             START("gpu",          GpuBenchTask, native, 0);
             START("msaa4",        GpuBenchTask, native, 4);
             START("msaa16",       GpuBenchTask, native, 16);