remove SK_SCALAR_IS_[FLOAT,FIXED] and assume floats

tests/Matrix44Test.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Test.h"
 #include "TestClassDef.h"
 #include "SkMatrix44.h"
 
 static bool nearly_equal_double(double a, double b) {
     const double tolerance = 1e-7;
     double diff = a - b;
     if (diff < 0)
         diff = -diff;
     return diff <= tolerance;
 }
 
 static bool nearly_equal_mscalar(SkMScalar a, SkMScalar b) {
     const SkMScalar tolerance = SK_MScalar1 / 200000;
 
     return SkTAbs<SkMScalar>(a - b) <= tolerance;
 }
 
 static bool nearly_equal_scalar(SkScalar a, SkScalar b) {
-    // Note that we get more compounded error for multiple operations when
-    // SK_SCALAR_IS_FIXED.
-#ifdef SK_SCALAR_IS_FLOAT
     const SkScalar tolerance = SK_Scalar1 / 200000;
-#else
-    const SkScalar tolerance = SK_Scalar1 / 1024;
-#endif
-
     return SkScalarAbs(a - b) <= tolerance;
 }
 
 template <typename T> void assert16(skiatest::Reporter* reporter, const T data[],
                                     T m0,  T m1,  T m2,  T m3,
                                     T m4,  T m5,  T m6,  T m7,
                                     T m8,  T m9,  T m10, T m11,
                                     T m12, T m13, T m14, T m15) {
     REPORTER_ASSERT(reporter, data[0] == m0);
     REPORTER_ASSERT(reporter, data[1] == m1);
@@ skipping 583 matching lines @@
     test_determinant(reporter);
     test_invert(reporter);
     test_transpose(reporter);
     test_get_set_double(reporter);
     test_set_row_col_major(reporter);
     test_translate(reporter);
     test_scale(reporter);
     test_map2(reporter);
     test_3x3_conversion(reporter);
 }