Revert of Move sRGB <-> linear conversion components to their own files. (patchset #5 id:80001 of https://codereview.chromium.org/2128893002/ )

Reason for revert:
Monotonicity assert is failing on ARM.  (Different rsqrt() and invert() precision?)  Will investigate a bit tomorrow... might reland with the test TODO.

Original issue's description:
> Move sRGB <-> linear conversion components to their own files.
>
> This makes them a little easier to use outside SkColorXform code.
>
> I've added some notes about how best to use them and their eccentricities, and added a test.
>
> Ultimately any software sRGB <-> linear conversion should funnel somehow through here.
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2128893002
> CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot
>
> Committed: https://skia.googlesource.com/skia/+/45e58c8807179638980aae8503573b950b844e4c

TBR=reed@google.com,msarett@google.com,mtklein@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review-Url: https://codereview.chromium.org/2131793002

1 files changed, 0 insertions, 34 deletions

diff --git a/tests/SRGBTest.cpp b/tests/SRGBTest.cpp
deleted file mode 100644
index 89930b5c05..0000000000
--- a/tests/SRGBTest.cpp
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkSRGB.h"
-#include "Test.h"
-#include <math.h>
-
-static uint8_t linear_to_srgb(float l) {
-    return (uint8_t)roundf(sk_linear_to_srgb(Sk4f{l})[0]);
-}
-
-DEF_TEST(sk_linear_to_srgb, r) {
-    // Should map 0 -> 0 and 1 -> 1.
-    REPORTER_ASSERT(r,   0 == linear_to_srgb(0.0f));
-    REPORTER_ASSERT(r, 255 == linear_to_srgb(1.0f));
-
-    // Should be monotonic between 0 and 1.
-    // We don't bother checking denorm values.
-    uint8_t prev = 0;
-    for (float f = FLT_MIN; f <= 1.0f; ) {
-        uint8_t srgb = linear_to_srgb(f);
-
-        REPORTER_ASSERT(r, srgb >= prev);
-        prev = srgb;
-
-        union { float flt; uint32_t bits; } pun = { f };
-        pun.bits++;
-        f = pun.flt;
-    }
-}