[turbofan] Added --csa-trap-on-node option that helps debugging graph verification issues.

src/code-stub-assembler.h

Index: src/code-stub-assembler.h
diff --git a/src/code-stub-assembler.h b/src/code-stub-assembler.h
index 9ef2e28a3f14baa629df9122839e77099eeabb61..53ea8a0da5b9d99bcee9647a7890391709e62ba8 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -53,8 +53,7 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
  public:
   typedef compiler::Node Node;
 
-  CodeStubAssembler(compiler::CodeAssemblerState* state)
-      : compiler::CodeAssembler(state) {}
+  CodeStubAssembler(compiler::CodeAssemblerState* state);
 
   enum AllocationFlag : uint8_t {
     kNone = 0,
@@ -1123,6 +1122,8 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
  private:
   friend class CodeStubArguments;
 
+  void HandleBreakOnNode();
+
   Node* AllocateRawAligned(Node* size_in_bytes, AllocationFlags flags,
                            Node* top_address, Node* limit_address);
   Node* AllocateRawUnaligned(Node* size_in_bytes, AllocationFlags flags,