Revert of Rename kPMColor_SkColorType to kN32_SkColorType.

src/effects/SkMatrixConvolutionImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkMatrixConvolutionImageFilter.h"
 #include "SkBitmap.h"
 #include "SkColorPriv.h"
@@ skipping 242 matching lines @@
                                                    const SkBitmap& source,
                                                    const Context& ctx,
                                                    SkBitmap* result,
                                                    SkIPoint* offset) const {
     SkBitmap src = source;
     SkIPoint srcOffset = SkIPoint::Make(0, 0);
     if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctx, &src, &srcOffset)) {
         return false;
     }
 
-    if (src.colorType() != kN32_SkColorType) {
+    if (src.colorType() != kPMColor_SkColorType) {
         return false;
     }
 
     SkIRect bounds;
     if (!this->applyCropRect(ctx, proxy, src, &srcOffset, &bounds, &src)) {
         return false;
     }
 
     if (!fConvolveAlpha && !src.isOpaque()) {
         src = unpremultiplyBitmap(src);
@@ skipping 388 matching lines @@
                                                 fBias,
                                                 fKernelOffset,
                                                 fTileMode,
                                                 fConvolveAlpha);
     return true;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 #endif