minor SkSL changes to avoid compiler errors in Chromium

src/sksl/ir/SkSLSymbolTable.cpp

Index: src/sksl/ir/SkSLSymbolTable.cpp
diff --git a/src/sksl/ir/SkSLSymbolTable.cpp b/src/sksl/ir/SkSLSymbolTable.cpp
index 80e22da0092073cf3d8b0378890b6399778c439e..9d8c0063c555fd43064dccbd0d79d0468fcda7fe 100644
--- a/src/sksl/ir/SkSLSymbolTable.cpp
+++ b/src/sksl/ir/SkSLSymbolTable.cpp
@@ -17,7 +17,7 @@ std::vector<const FunctionDeclaration*> SymbolTable::GetFunctions(const Symbol&
         case Symbol::kUnresolvedFunction_Kind:
             return ((UnresolvedFunction&) s).fFunctions;
         default:
-            return { };
+            return std::vector<const FunctionDeclaration*>();
     }
 }