[wasm] Add a flag --wasm-opt to test optimizations in the WASM pipeline.

test/cctest/wasm/wasm-run-utils.h

Index: test/cctest/wasm/wasm-run-utils.h
diff --git a/test/cctest/wasm/wasm-run-utils.h b/test/cctest/wasm/wasm-run-utils.h
index eff411f2a6fd75cd7e10544e9d9ed9fae4aa1e1e..561dda3ea7941b894a1ad8c1a8997b635eb6ef44 100644
--- a/test/cctest/wasm/wasm-run-utils.h
+++ b/test/cctest/wasm/wasm-run-utils.h
@@ -564,7 +564,7 @@ class WasmFunctionCompiler : public HandleAndZoneScope,
     CompilationInfo info(debug_name_, this->isolate(), this->zone(),
                          Code::ComputeFlags(Code::WASM_FUNCTION));
     std::unique_ptr<CompilationJob> job(Pipeline::NewWasmCompilationJob(
-        &info, graph(), desc, &source_position_table_));
+        &info, &jsgraph, desc, &source_position_table_));
     if (job->ExecuteJob() != CompilationJob::SUCCEEDED ||
         job->FinalizeJob() != CompilationJob::SUCCEEDED)
       return Handle<Code>::null();