DevTools: instrument user callbacks based on generic probes, remove NativeBreakpoint.

third_party/WebKit/Source/core/inspector/CodeGeneratorInstrumentation.py

Index: third_party/WebKit/Source/core/inspector/CodeGeneratorInstrumentation.py
diff --git a/third_party/WebKit/Source/core/inspector/CodeGeneratorInstrumentation.py b/third_party/WebKit/Source/core/inspector/CodeGeneratorInstrumentation.py
index 88bc277e1302386bd70ed7c93fab23e238f1586c..b92887b3c1c357f8da6ba4e15bb3f0ca0cb19716 100755
--- a/third_party/WebKit/Source/core/inspector/CodeGeneratorInstrumentation.py
+++ b/third_party/WebKit/Source/core/inspector/CodeGeneratorInstrumentation.py
@@ -269,7 +269,7 @@ class Method:
         return self.return_type == ""
 
     def generate_header(self, header_lines):
-        param_list = ", ".join(map(Parameter.to_str_class, self.params))
+        param_list = ", ".join(map(Parameter.to_str_class_and_value, self.params))
         if self.is_scoped():
             member_list = "\n".join(map(generate_member_decl, self.params))
             header_lines.append(template_scoped_decl.substitute(
@@ -401,6 +401,11 @@ class Parameter:
     def to_str_class_and_name(self):
         return "%s %s" % (self.type, self.name)
 
+    def to_str_class_and_value(self):
+        if self.default_value:
+            return "%s = %s" % (self.to_str_class(), self.default_value)
+        return self.to_str_class()
+
     def to_str_class(self):
         return self.type