Revert of Revert of Rename kPMColor_SkColorType to kN32_SkColorType. (https://codereview.chromium.org/234243002/)

Reason for revert:
Want to reland the original CL.

Original issue's description:
> Revert of Rename kPMColor_SkColorType to kN32_SkColorType. (https://codereview.chromium.org/227433009/)
>
> Reason for revert:
> breaking the Chrome deps roll.
> http://build.chromium.org/p/chromium.linux/builders/Linux%20GN%20%28dbg%29/builds/839/steps/compile/logs/stdio
>
> 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
>
> TBR=reed@google.com,scroggo@google.com
> NOTREECHECKS=true
> NOTRY=true
> BUG=skia:2384
>
> Committed: http://code.google.com/p/skia/source/detail?r=14144

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

Author: scroggo@google.com

Review URL: https://codereview.chromium.org/235523003

git-svn-id: http://skia.googlecode.com/svn/trunk@14156 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/tilemodes.cpp b/gm/tilemodes.cpp
index 5b97f13..abecada 100644
--- a/gm/tilemodes.cpp
+++ b/gm/tilemodes.cpp
@@ -50,7 +50,7 @@
 }
 
 static const SkColorType gColorTypes[] = {
-    kPMColor_SkColorType,
+    kN32_SkColorType,
     kRGB_565_SkColorType,
 };
 
@@ -166,7 +166,7 @@
 
 static SkShader* make_bm(SkShader::TileMode tx, SkShader::TileMode ty) {
     SkBitmap bm;
-    makebm(&bm, kPMColor_SkColorType, gWidth, gHeight);
+    makebm(&bm, kN32_SkColorType, gWidth, gHeight);
     return SkShader::CreateBitmapShader(bm, tx, ty);
 }