Create fragment processor for performing input color blend with child processor

src/gpu/SkGr.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGr.h"
 
 #include "GrCaps.h"
@@ skipping 716 matching lines @@
     grPaint->setColor(paintColor);
 
     SkColorFilter* colorFilter = skPaint.getColorFilter();
     if (colorFilter) {
         // if the source color is a constant then apply the filter here once rather than per pixel
         // in a shader.
         if (constantColor) {
             SkColor filtered = colorFilter->filterColor(skPaint.getColor());
             grPaint->setColor(SkColor2GrColor(filtered));
         } else {
-            SkTDArray<GrFragmentProcessor*> array;
+            SkTDArray<const GrFragmentProcessor*> array;
             // return false if failed?
             if (colorFilter->asFragmentProcessors(context, grPaint->getProcessorDataManager(),
                                                   &array)) {
                 for (int i = 0; i < array.count(); ++i) {
                     grPaint->addColorFragmentProcessor(array[i]);
                     array[i]->unref();
                 }
             }
         }
     }
@@ skipping 101 matching lines @@
             SkErrorInternals::SetError( kInvalidPaint_SkError,
                                         "Sorry, I don't understand the filtering "
                                         "mode you asked for.  Falling back to "
                                         "MIPMaps.");
             textureFilterMode = GrTextureParams::kMipMap_FilterMode;
             break;
 
     }
     return textureFilterMode;
 }