1 files changed, 3 insertions, 22 deletions
diff --git a/src/sksl/ir/SkSLExpression.h b/src/sksl/ir/SkSLExpression.h
index f87d810fc0..b4ed37c09a 100644
--- a/src/sksl/ir/SkSLExpression.h
+++ b/src/sksl/ir/SkSLExpression.h
@@ -4,24 +4,17 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-
+ 
 #ifndef SKSL_EXPRESSION
 #define SKSL_EXPRESSION
 
+#include "SkSLIRNode.h"
 #include "SkSLType.h"
-#include "SkSLVariable.h"
-
-#include <unordered_map>
 
 namespace SkSL {
 
-struct Expression;
-class IRGenerator;
-
-typedef std::unordered_map<const Variable*, std::unique_ptr<Expression>*> DefinitionMap;
-
 /**
- * Abstract supertype of all expressions.
+ * Abstract supertype of all expressions. 
  */
 struct Expression : public IRNode {
     enum Kind {
@@ -52,18 +45,6 @@ struct Expression : public IRNode {
         return false;
     }
 
-    /**
-     * Given a map of known constant variable values, substitute them in for references to those
-     * variables occurring in this expression and its subexpressions.  Similar simplifications, such
-     * as folding a constant binary expression down to a single value, may also be performed.
-     * Returns a new expression which replaces this expression, or null if no replacements were
-     * made. If a new expression is returned, this expression is no longer valid.
-     */
-    virtual std::unique_ptr<Expression> constantPropagate(const IRGenerator& irGenerator,
-                                                          const DefinitionMap& definitions) {
-        return nullptr;
-    }
-
     const Kind fKind;
     const Type& fType;