remove external header for SkModeColorFilter

src/core/SkModeColorFilter.cpp

 /*
  * Copyright 2006 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 "SkBlitRow.h"
 #include "SkColorFilter.h"
 #include "SkColorPriv.h"
 #include "SkModeColorFilter.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 #include "SkUtils.h"
 #include "SkString.h"
 #include "SkValidationUtils.h"
 
+//////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifndef SK_IGNORE_TO_STRING
+void SkModeColorFilter::toString(SkString* str) const {
+    str->append("SkModeColorFilter: color: 0x");
+    str->appendHex(fColor);
+    str->append(" mode: ");
+    str->append(SkXfermode::ModeName(fMode));
+}
+#endif
+
 bool SkModeColorFilter::asColorMode(SkColor* color, SkXfermode::Mode* mode) const {
     if (color) {
         *color = fColor;
     }
     if (mode) {
         *mode = fMode;
     }
     return true;
 }
 
@@ skipping 65 matching lines @@
         SkASSERT(io.validFlags() == kRGBA_GrColorComponentFlags);
     }
 #endif
     return fp;
 }
 
 #endif
 
 ///////////////////////////////////////////////////////////////////////////////
 
-class Src_SkModeColorFilter : public SkModeColorFilter {
+class Src_SkModeColorFilter final : public SkModeColorFilter {
 public:
     Src_SkModeColorFilter(SkColor color) : INHERITED(color, SkXfermode::kSrc_Mode) {}
 
     void filterSpan(const SkPMColor shader[], int count, SkPMColor result[]) const override {
         sk_memset32(result, this->getPMColor(), count);
     }
 
 private:
     typedef SkModeColorFilter INHERITED;
 };
 
-class SrcOver_SkModeColorFilter : public SkModeColorFilter {
+class SrcOver_SkModeColorFilter final : public SkModeColorFilter {
 public:
     SrcOver_SkModeColorFilter(SkColor color) : INHERITED(color, SkXfermode::kSrcOver_Mode) { }
 
     void filterSpan(const SkPMColor shader[], int count, SkPMColor result[]) const override {
         SkBlitRow::Color32(result, shader, count, this->getPMColor());
     }
 
 private:
     typedef SkModeColorFilter INHERITED;
 };
@@ skipping 35 matching lines @@
 
     switch (mode) {
         case SkXfermode::kSrc_Mode:
             return new Src_SkModeColorFilter(color);
         case SkXfermode::kSrcOver_Mode:
             return new SrcOver_SkModeColorFilter(color);
         default:
             return SkModeColorFilter::Create(color, mode);
     }
 }