Re-re-land "added GrSkSLFP and converted DitherEffect to use it"

This reverts commit 6c48e4d11ce80fa5cfef56e13b2d5847fe94a7cc.

Bug: skia:
Change-Id: I7ee78990fc30eec545d1856e59eb6e0573089426
Reviewed-on: https://skia-review.googlesource.com/144348
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 10 insertions, 3 deletions

diff --git a/src/sksl/ir/SkSLFloatLiteral.h b/src/sksl/ir/SkSLFloatLiteral.h
index 82c15c032b..e995e4c6e1 100644
--- a/src/sksl/ir/SkSLFloatLiteral.h
+++ b/src/sksl/ir/SkSLFloatLiteral.h
@@ -17,9 +17,12 @@ namespace SkSL {
  * A literal floating point number.
  */
 struct FloatLiteral : public Expression {
-    FloatLiteral(const Context& context, int offset, double value,
-                 const Type* type = nullptr)
-    : INHERITED(offset, kFloatLiteral_Kind, type ? *type : *context.fFloat_Type)
+    FloatLiteral(const Context& context, int offset, double value)
+    : INHERITED(offset, kFloatLiteral_Kind, *context.fFloat_Type)
+    , fValue(value) {}
+
+    FloatLiteral(int offset, double value, const Type* type)
+    : INHERITED(offset, kFloatLiteral_Kind, *type)
     , fValue(value) {}
 
     String description() const override {
@@ -43,6 +46,10 @@ struct FloatLiteral : public Expression {
         return fValue;
     }
 
+    std::unique_ptr<Expression> clone() const override {
+        return std::unique_ptr<Expression>(new FloatLiteral(fOffset, fValue, &fType));
+    }
+
     const double fValue;
 
     typedef Expression INHERITED;