Revert of add SkMatrix::decomposeScale

tests/MatrixTest.cpp

Index: tests/MatrixTest.cpp
diff --git a/tests/MatrixTest.cpp b/tests/MatrixTest.cpp
index 95d33acabd7ac42e0545efbc93b2a84d32ca668b..7875d9ea45cd5e726cde798521eff1c6f1d25739 100644
--- a/tests/MatrixTest.cpp
+++ b/tests/MatrixTest.cpp
@@ -771,34 +771,6 @@
 
 }
 
-static bool check_decompScale(const SkMatrix& matrix) {
-    SkSize scale;
-    SkMatrix remaining;
-
-    if (!matrix.decomposeScale(&scale, &remaining)) {
-        return false;
-    }
-    if (scale.width() <= 0 || scale.height() <= 0) {
-        return false;
-    }
-    remaining.preScale(scale.width(), scale.height());
-    return nearly_equal(matrix, remaining);
-}
-
-static void test_decompScale(skiatest::Reporter* reporter) {
-    SkMatrix m;
-
-    m.reset();
-    REPORTER_ASSERT(reporter, check_decompScale(m));
-    m.setScale(2, 3);
-    REPORTER_ASSERT(reporter, check_decompScale(m));
-    m.setRotate(35, 0, 0);
-    REPORTER_ASSERT(reporter, check_decompScale(m));
-
-    m.setScale(1, 0);
-    REPORTER_ASSERT(reporter, !check_decompScale(m));
-}
-
 DEF_TEST(Matrix, reporter) {
     SkMatrix    mat, inverse, iden1, iden2;
 
@@ -917,8 +889,6 @@
     test_matrix_decomposition(reporter);
     test_matrix_homogeneous(reporter);
     test_set9(reporter);
-
-    test_decompScale(reporter);
 }
 
 DEF_TEST(Matrix_Concat, r) {