remove legacy 255-biased colormatrix

Bug: skia:4872
Bug: skia:9012

Change-Id: I7c1ac4e94405404fcb13079b5b578a5a26aad02e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/210628
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: Mike Reed <reed@google.com>
diff --git a/include/core/SkColorFilter.h b/include/core/SkColorFilter.h
index dca388d..eb48068 100644
--- a/include/core/SkColorFilter.h
+++ b/include/core/SkColorFilter.h
@@ -37,7 +37,6 @@
     bool asColorMode(SkColor* color, SkBlendMode* mode) const {
         return this->onAsAColorMode(color, mode);
     }
-    bool asColorMatrix(float rowMajor255[20]) const;
 
     /** If the filter can be represented by a source color plus Mode, this
      *  returns true, and sets (if not NULL) the color and mode appropriately.
@@ -140,9 +139,6 @@
 
 class SK_API SkColorFilters {
 public:
-    // Deprecated: use Matrix(...) with 0...1 values for translate
-    static sk_sp<SkColorFilter> MatrixRowMajor255(const float array[20]);
-
     static sk_sp<SkColorFilter> Compose(sk_sp<SkColorFilter> outer, sk_sp<SkColorFilter> inner) {
         return outer ? outer->makeComposed(inner) : inner;
     }
diff --git a/src/core/SkColorFilter.cpp b/src/core/SkColorFilter.cpp
index 107fa67..72b359a 100644
--- a/src/core/SkColorFilter.cpp
+++ b/src/core/SkColorFilter.cpp
@@ -32,21 +32,6 @@
     return false;
 }
 
-// DEPRECATED
-bool SkColorFilter::asColorMatrix(float rowMajor255[20]) const {
-    if (this->asAColorMatrix(rowMajor255)) {
-        if (rowMajor255) {
-            rowMajor255[ 4] *= 255;
-            rowMajor255[ 9] *= 255;
-            rowMajor255[14] *= 255;
-            rowMajor255[19] *= 255;
-        }
-        return true;
-    }
-    return false;
-}
-
-
 #if SK_SUPPORT_GPU
 std::unique_ptr<GrFragmentProcessor> SkColorFilter::asFragmentProcessor(
         GrRecordingContext*, const GrColorSpaceInfo&) const {
diff --git a/src/core/SkColorFilter_Matrix.cpp b/src/core/SkColorFilter_Matrix.cpp
index 8757b7e..0a648e5 100644
--- a/src/core/SkColorFilter_Matrix.cpp
+++ b/src/core/SkColorFilter_Matrix.cpp
@@ -16,12 +16,6 @@
 #include "src/core/SkReadBuffer.h"
 #include "src/core/SkWriteBuffer.h"
 
-static void scale_last_column(float rowMajor[20], float scale) {
-    for (int i = 0; i < 4; ++i) {
-        rowMajor[5*i + 4] *= scale;
-    }
-}
-
 void SkColorFilter_Matrix::initState() {
     const float* srcA = fMatrix + 15;
     fFlags = (srcA[0] == 0 && srcA[1] == 0 && srcA[2] == 0 && srcA[3] == 1 && srcA[4] == 0)
@@ -203,14 +197,6 @@
     return Matrix(cm.fMat);
 }
 
-// DEPRECATED
-sk_sp<SkColorFilter> SkColorFilters::MatrixRowMajor255(const float array[20]) {
-    float tmp[20];
-    memcpy(tmp, array, sizeof(tmp));
-    scale_last_column(tmp, 1.0f/255);
-    return Matrix(tmp);
-}
-
 void SkColorFilter_Matrix::RegisterFlattenables() {
     SK_REGISTER_FLATTENABLE(SkColorFilter_Matrix);
 
@@ -219,7 +205,10 @@
                             [](SkReadBuffer& buffer) -> sk_sp<SkFlattenable> {
         float matrix[20];
         if (buffer.readScalarArray(matrix, 20)) {
-            scale_last_column(matrix, 1.0f/255);
+            matrix[ 4] *= (1.0f/255);
+            matrix[ 9] *= (1.0f/255);
+            matrix[14] *= (1.0f/255);
+            matrix[19] *= (1.0f/255);
             return SkColorFilters::Matrix(matrix);
         }
         return nullptr;