[wasm] Improve output of PrintAstForDebugging.

src/wasm/ast-decoder.h

Index: src/wasm/ast-decoder.h
diff --git a/src/wasm/ast-decoder.h b/src/wasm/ast-decoder.h
index 4138381915e542fd7395924dfd41b655d7d5c15e..9e96053a6ce035773fbe9f992e24d2f0e8430c35 100644
--- a/src/wasm/ast-decoder.h
+++ b/src/wasm/ast-decoder.h
@@ -224,6 +224,9 @@ TreeResult BuildTFGraph(base::AccountingAllocator* allocator,
                         TFBuilder* builder, FunctionBody& body);
 void PrintAst(base::AccountingAllocator* allocator, FunctionBody& body);
 
+// A simplified form of AST printing, e.g. from a debugger.
+void PrintAstForDebugging(const byte* start, const byte* end);
+
 inline TreeResult VerifyWasmCode(base::AccountingAllocator* allocator,
                                  ModuleEnv* module, FunctionSig* sig,
                                  const byte* start, const byte* end) {