Revert of Reduced skslc memory consumption

src/sksl/ir/SkSLFunctionDeclaration.h

Index: src/sksl/ir/SkSLFunctionDeclaration.h
diff --git a/src/sksl/ir/SkSLFunctionDeclaration.h b/src/sksl/ir/SkSLFunctionDeclaration.h
index 52a579a89b9e13dbb2f36e22feaf224d0b04fbe8..ffde0c66c130aedb069da390899b5011eb1cc1af 100644
--- a/src/sksl/ir/SkSLFunctionDeclaration.h
+++ b/src/sksl/ir/SkSLFunctionDeclaration.h
@@ -8,7 +8,6 @@
 #ifndef SKSL_FUNCTIONDECLARATION
 #define SKSL_FUNCTIONDECLARATION
 
-#include "SkSLExpression.h"
 #include "SkSLModifiers.h"
 #include "SkSLSymbol.h"
 #include "SkSLSymbolTable.h"
@@ -56,50 +55,6 @@
         return true;
     }
 
-    /**
-     * Determine the effective types of this function's parameters and return value when called with
-     * the given arguments. This is relevant for functions with generic parameter types, where this 
-     * will collapse the generic types down into specific concrete types.
-     *
-     * Returns true if it was able to select a concrete set of types for the generic function, false
-     * if there is no possible way this can match the argument types. Note that even a true return
-     * does not guarantee that the function can be successfully called with those arguments, merely
-     * indicates that an attempt should be made. If false is returned, the state of
-     * outParameterTypes and outReturnType are undefined.
-     */
-    bool determineFinalTypes(const std::vector<std::unique_ptr<Expression>>& arguments,
-                             std::vector<const Type*>* outParameterTypes,
-                             const Type** outReturnType) const {
-        assert(arguments.size() == fParameters.size());
-        int genericIndex = -1;
-        for (size_t i = 0; i < arguments.size(); i++) {
-            if (fParameters[i]->fType.kind() == Type::kGeneric_Kind) {
-                std::vector<const Type*> types = fParameters[i]->fType.coercibleTypes();
-                if (genericIndex == -1) {
-                    for (size_t j = 0; j < types.size(); j++) {
-                        if (arguments[i]->fType.canCoerceTo(*types[j])) {
-                            genericIndex = j;
-                            break;
-                        }
-                    }
-                    if (genericIndex == -1) {
-                        return false;
-                    }
-                }
-                outParameterTypes->push_back(types[genericIndex]);
-            } else {
-                outParameterTypes->push_back(&fParameters[i]->fType);
-            }
-        }
-        if (fReturnType.kind() == Type::kGeneric_Kind) {
-            assert(genericIndex != -1);
-            *outReturnType = fReturnType.coercibleTypes()[genericIndex];
-        } else {
-            *outReturnType = &fReturnType;
-        }
-        return true;
-    }
-
     mutable bool fDefined;
     bool fBuiltin;
     const std::vector<const Variable*> fParameters;