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/bench/benchmain.cpp b/bench/benchmain.cpp
index cc55bb9..ca760b7 100644
--- a/bench/benchmain.cpp
+++ b/bench/benchmain.cpp
@@ -207,20 +207,20 @@
     GLContextType       contextType;
     bool                runByDefault;
 } gConfigs[] = {
-    { kN32_SkColorType,     "NONRENDERING", 0, SkBenchmark::kNonRendering_Backend, kNative, true},
-    { kN32_SkColorType,     "8888",         0, SkBenchmark::kRaster_Backend,       kNative, true},
+    { kPMColor_SkColorType, "NONRENDERING", 0, SkBenchmark::kNonRendering_Backend, kNative, true},
+    { kPMColor_SkColorType, "8888",         0, SkBenchmark::kRaster_Backend,       kNative, true},
     { kRGB_565_SkColorType, "565",          0, SkBenchmark::kRaster_Backend,       kNative, true},
 #if SK_SUPPORT_GPU
-    { kN32_SkColorType,     "GPU",          0, SkBenchmark::kGPU_Backend,          kNative, true},
-    { kN32_SkColorType,     "MSAA4",        4, SkBenchmark::kGPU_Backend,          kNative, false},
-    { kN32_SkColorType,     "MSAA16",      16, SkBenchmark::kGPU_Backend,          kNative, false},
-    { kN32_SkColorType,     "NVPRMSAA4",    4, SkBenchmark::kGPU_Backend,          kNVPR,   true},
-    { kN32_SkColorType,     "NVPRMSAA16",  16, SkBenchmark::kGPU_Backend,          kNVPR,   false},
+    { kPMColor_SkColorType, "GPU",          0, SkBenchmark::kGPU_Backend,          kNative, true},
+    { kPMColor_SkColorType, "MSAA4",        4, SkBenchmark::kGPU_Backend,          kNative, false},
+    { kPMColor_SkColorType, "MSAA16",      16, SkBenchmark::kGPU_Backend,          kNative, false},
+    { kPMColor_SkColorType, "NVPRMSAA4",    4, SkBenchmark::kGPU_Backend,          kNVPR,   true},
+    { kPMColor_SkColorType, "NVPRMSAA16",  16, SkBenchmark::kGPU_Backend,          kNVPR,   false},
 #if SK_ANGLE
-    { kN32_SkColorType,     "ANGLE",        0, SkBenchmark::kGPU_Backend,          kANGLE,  true},
+    { kPMColor_SkColorType, "ANGLE",        0, SkBenchmark::kGPU_Backend,          kANGLE,  true},
 #endif // SK_ANGLE
-    { kN32_SkColorType,     "Debug",        0, SkBenchmark::kGPU_Backend,          kDebug,  kIsDebug},
-    { kN32_SkColorType,     "NULLGPU",      0, SkBenchmark::kGPU_Backend,          kNull,   true},
+    { kPMColor_SkColorType, "Debug",        0, SkBenchmark::kGPU_Backend,          kDebug,  kIsDebug},
+    { kPMColor_SkColorType, "NULLGPU",      0, SkBenchmark::kGPU_Backend,          kNull,   true},
 #endif // SK_SUPPORT_GPU
 };