[stubs] Enable machine graph verification for CodeStubAssembler and friends by default in debug mode

src/compiler/code-assembler.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_CODE_ASSEMBLER_H_
 #define V8_COMPILER_CODE_ASSEMBLER_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 172 matching lines @@
 //
 // The CodeAssembler itself is stateless (and instances are expected to be
 // temporary-scoped and short-lived); all its state is encapsulated into
 // a CodeAssemblerState instance.
 class V8_EXPORT_PRIVATE CodeAssembler {
  public:
   explicit CodeAssembler(CodeAssemblerState* state) : state_(state) {}
 
   virtual ~CodeAssembler();
 
-  static Handle<Code> GenerateCode(CodeAssemblerState* state,
-                                   bool verify_graph = false);
+  static Handle<Code> GenerateCode(CodeAssemblerState* state);
 
   bool Is64() const;
   bool IsFloat64RoundUpSupported() const;
   bool IsFloat64RoundDownSupported() const;
   bool IsFloat64RoundTiesEvenSupported() const;
   bool IsFloat64RoundTruncateSupported() const;
 
   // Shortened aliases for use in CodeAssembler subclasses.
   typedef CodeAssemblerLabel Label;
   typedef CodeAssemblerVariable Variable;
@@ skipping 357 matching lines @@
   ZoneSet<CodeAssemblerVariable::Impl*> variables_;
 
   DISALLOW_COPY_AND_ASSIGN(CodeAssemblerState);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_ASSEMBLER_H_