Revert "converted AARectEffect to new FP system"

This reverts commit 222e275b0ab4c8a2af152c637bf9dbc28b4a097f.

Reason for revert: perf regression

Original change's description:
> converted AARectEffect to new FP system
> 
> Bug: skia:
> Change-Id: I0e4141c7f547bab92c65a6abff120ed04d5c2c66
> Reviewed-on: https://skia-review.googlesource.com/c/153550
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

TBR=bsalomon@google.com,ethannicholas@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: skia:
Change-Id: I3d7036a78d8582d6790c77b20a60e6e5257d1881
Reviewed-on: https://skia-review.googlesource.com/c/162283
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
diff --git a/src/gpu/effects/GrAARectEffect.cpp b/src/gpu/effects/GrAARectEffect.cpp
new file mode 100644
index 0000000..9ee0ad5
--- /dev/null
+++ b/src/gpu/effects/GrAARectEffect.cpp
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/**************************************************************************************************
+ *** This file was autogenerated from GrAARectEffect.fp; do not modify.
+ **************************************************************************************************/
+#include "GrAARectEffect.h"
+#include "glsl/GrGLSLFragmentProcessor.h"
+#include "glsl/GrGLSLFragmentShaderBuilder.h"
+#include "glsl/GrGLSLProgramBuilder.h"
+#include "GrTexture.h"
+#include "SkSLCPP.h"
+#include "SkSLUtil.h"
+class GrGLSLAARectEffect : public GrGLSLFragmentProcessor {
+public:
+    GrGLSLAARectEffect() {}
+    void emitCode(EmitArgs& args) override {
+        GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
+        const GrAARectEffect& _outer = args.fFp.cast<GrAARectEffect>();
+        (void)_outer;
+        auto edgeType = _outer.edgeType();
+        (void)edgeType;
+        auto rect = _outer.rect();
+        (void)rect;
+        prevRect = float4(-1.0);
+        fRectUniformVar = args.fUniformHandler->addUniform(
+                kFragment_GrShaderFlag, kFloat4_GrSLType, kDefault_GrSLPrecision, "rectUniform");
+        fragBuilder->codeAppendf(
+                "float4 prevRect = float4(%f, %f, %f, %f);\nhalf alpha;\n@switch (%d) {\n    case "
+                "0:\n    case 2:\n        alpha = half(all(greaterThan(float4(sk_FragCoord.xy, "
+                "%s.zw), float4(%s.xy, sk_FragCoord.xy))) ? 1 : 0);\n        break;\n    "
+                "default:\n        half xSub, ySub;\n        xSub = half(min(sk_FragCoord.x - "
+                "%s.x, 0.0));\n        xSub += half(min(%s.z - sk_FragCoord.x, 0.0));\n        "
+                "ySub = half(min(sk_FragCoord.y - %s.y, 0.0));\n        ySub += half(min(%s.w - "
+                "sk_FragCoord.y, 0.0));\n        alpha = half((1",
+                prevRect.left(),
+                prevRect.top(),
+                prevRect.right(),
+                prevRect.bottom(),
+                (int)_outer.edgeType(),
+                args.fUniformHandler->getUniformCStr(fRectUniformVar),
+                args.fUniformHandler->getUniformCStr(fRectUniformVar),
+                args.fUniformHandler->getUniformCStr(fRectUniformVar),
+                args.fUniformHandler->getUniformCStr(fRectUniformVar),
+                args.fUniformHandler->getUniformCStr(fRectUniformVar),
+                args.fUniformHandler->getUniformCStr(fRectUniformVar));
+        fragBuilder->codeAppendf(
+                ".0 + max(float(xSub), -1.0)) * (1.0 + max(float(ySub), -1.0)));\n}\n@if (%d == 2 "
+                "|| %d == 3) {\n    alpha = half(1.0 - float(alpha));\n}\n%s = %s * alpha;\n",
+                (int)_outer.edgeType(),
+                (int)_outer.edgeType(),
+                args.fOutputColor,
+                args.fInputColor);
+    }
+
+private:
+    void onSetData(const GrGLSLProgramDataManager& pdman,
+                   const GrFragmentProcessor& _proc) override {
+        const GrAARectEffect& _outer = _proc.cast<GrAARectEffect>();
+        auto edgeType = _outer.edgeType();
+        (void)edgeType;
+        auto rect = _outer.rect();
+        (void)rect;
+        UniformHandle& rectUniform = fRectUniformVar;
+        (void)rectUniform;
+
+        const SkRect& newRect = GrProcessorEdgeTypeIsAA(edgeType) ? rect.makeInset(.5f, .5f) : rect;
+        if (newRect != prevRect) {
+            pdman.set4f(rectUniform, newRect.fLeft, newRect.fTop, newRect.fRight, newRect.fBottom);
+            prevRect = newRect;
+        }
+    }
+    SkRect prevRect = float4(0);
+    UniformHandle fRectUniformVar;
+};
+GrGLSLFragmentProcessor* GrAARectEffect::onCreateGLSLInstance() const {
+    return new GrGLSLAARectEffect();
+}
+void GrAARectEffect::onGetGLSLProcessorKey(const GrShaderCaps& caps,
+                                           GrProcessorKeyBuilder* b) const {
+    b->add32((int32_t)fEdgeType);
+}
+bool GrAARectEffect::onIsEqual(const GrFragmentProcessor& other) const {
+    const GrAARectEffect& that = other.cast<GrAARectEffect>();
+    (void)that;
+    if (fEdgeType != that.fEdgeType) return false;
+    if (fRect != that.fRect) return false;
+    return true;
+}
+GrAARectEffect::GrAARectEffect(const GrAARectEffect& src)
+        : INHERITED(kGrAARectEffect_ClassID, src.optimizationFlags())
+        , fEdgeType(src.fEdgeType)
+        , fRect(src.fRect) {}
+std::unique_ptr<GrFragmentProcessor> GrAARectEffect::clone() const {
+    return std::unique_ptr<GrFragmentProcessor>(new GrAARectEffect(*this));
+}
+GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrAARectEffect);
+#if GR_TEST_UTILS
+std::unique_ptr<GrFragmentProcessor> GrAARectEffect::TestCreate(GrProcessorTestData* d) {
+    SkRect rect = SkRect::MakeLTRB(d->fRandom->nextSScalar1(),
+                                   d->fRandom->nextSScalar1(),
+                                   d->fRandom->nextSScalar1(),
+                                   d->fRandom->nextSScalar1());
+    std::unique_ptr<GrFragmentProcessor> fp;
+    do {
+        GrClipEdgeType edgeType =
+                static_cast<GrClipEdgeType>(d->fRandom->nextULessThan(kGrClipEdgeTypeCnt));
+
+        fp = GrAARectEffect::Make(edgeType, rect);
+    } while (nullptr == fp);
+    return fp;
+}
+#endif