Revert of Rename kPMColor_SkColorType to kN32_SkColorType.

src/image/SkImagePriv.cpp

Index: src/image/SkImagePriv.cpp
diff --git a/src/image/SkImagePriv.cpp b/src/image/SkImagePriv.cpp
index dada230de82431deb94c75b925c71bdbfee9267a..a044aad0a0da343ca3eed7d301500d3c3c808da6 100644
--- a/src/image/SkImagePriv.cpp
+++ b/src/image/SkImagePriv.cpp
@@ -20,7 +20,7 @@
         case kRGB_565_SkColorType:
             return SkBitmap::kRGB_565_Config;
 
-        case kN32_SkColorType:
+        case kPMColor_SkColorType:
             return SkBitmap::kARGB_8888_Config;
 
         case kIndex_8_SkColorType:
@@ -44,7 +44,7 @@
         kIndex_8_SkColorType,   // kIndex8_Config
         kRGB_565_SkColorType,   // kRGB_565_Config
         kARGB_4444_SkColorType, // kARGB_4444_Config
-        kN32_SkColorType,   // kARGB_8888_Config
+        kPMColor_SkColorType,   // kARGB_8888_Config
     };
     SkASSERT((unsigned)config < SK_ARRAY_COUNT(gCT));
     return gCT[config];