1 files changed, 2 insertions, 11 deletions
diff --git a/deps/v8/src/compiler/graph-visualizer.h b/deps/v8/src/compiler/graph-visualizer.h
index d719540e23..1a971a55ed 100644
--- a/deps/v8/src/compiler/graph-visualizer.h
+++ b/deps/v8/src/compiler/graph-visualizer.h
@@ -24,14 +24,6 @@ class SourcePositionTable;
 FILE* OpenVisualizerLogFile(CompilationInfo* info, const char* phase,
                             const char* suffix, const char* mode);
 
-struct AsDOT {
-  explicit AsDOT(const Graph& g) : graph(g) {}
-  const Graph& graph;
-};
-
-std::ostream& operator<<(std::ostream& os, const AsDOT& ad);
-
-
 struct AsJSON {
   AsJSON(const Graph& g, SourcePositionTable* p) : graph(g), positions(p) {}
   const Graph& graph;
@@ -56,8 +48,8 @@ struct AsC1VCompilation {
 
 struct AsC1V {
   AsC1V(const char* phase, const Schedule* schedule,
-        const SourcePositionTable* positions = NULL,
-        const InstructionSequence* instructions = NULL)
+        const SourcePositionTable* positions = nullptr,
+        const InstructionSequence* instructions = nullptr)
       : schedule_(schedule),
         instructions_(instructions),
         positions_(positions),
@@ -76,7 +68,6 @@ struct AsC1VRegisterAllocationData {
   const RegisterAllocationData* data_;
 };
 
-std::ostream& operator<<(std::ostream& os, const AsDOT& ad);
 std::ostream& operator<<(std::ostream& os, const AsC1VCompilation& ac);
 std::ostream& operator<<(std::ostream& os, const AsC1V& ac);
 std::ostream& operator<<(std::ostream& os,