Reland "Revert "added GrSkSLFP and converted DitherEffect to use it""

This reverts commit 97ae0c89025dfd791047f5701e57d58da37c125c.

Reason for revert: Breaking ANGLE.

Original change's description:
> Revert "Revert "added GrSkSLFP and converted DitherEffect to use it""
> 
> This reverts commit f2030783094e502fb74221077a5ee7cb41287fe4.
> 
> Bug: skia:
> Change-Id: Icaaa8b3ea652a8f126bfbcc788a360493a7ebe3e
> Reviewed-on: https://skia-review.googlesource.com/137391
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>

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

Change-Id: I65d6d2707fceab0a99121c528d1b848d23e34bfa
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/142588
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 0 insertions, 19 deletions

diff --git a/src/sksl/sksl_pipeline.inc b/src/sksl/sksl_pipeline.inc
deleted file mode 100644
index f0a2221607..0000000000
--- a/src/sksl/sksl_pipeline.inc
+++ /dev/null
@@ -1,19 +0,0 @@
-STRINGIFY(
-    // special-cased within the compiler - append takes various arguments depending on what kind of
-    // stage is being appended
-    sk_has_side_effects void append();
-
-    float abs(float x);
-    float sin(float x);
-    float cos(float y);
-    float tan(float x);
-    float sqrt(float x);
-    float clamp(float x, float min, float max);
-    float2 clamp(float2 x, float min, float max);
-    float3 clamp(float3 x, float min, float max);
-    float4 clamp(float4 x, float min, float max);
-    sk_has_side_effects void print(float x);
-    layout(builtin=10009) int sk_x;
-    layout(builtin=10010) int sk_y;
-    layout(builtin=10004) out half4 sk_OutColor;
-)