DevTools: remove PerformanceMonitor::HandlerCall, migrate to the new scoped probes.

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 7a4cea791a18431f36b886b78da096b4d1573f23..fed47aa2e3d5947a7c9d489945eae26061266829 100755
--- a/third_party/WebKit/Source/core/inspector/CodeGeneratorInstrumentation.py
+++ b/third_party/WebKit/Source/core/inspector/CodeGeneratorInstrumentation.py
@@ -60,6 +60,7 @@ namespace blink {
 ${extra_definitions}
 
 namespace probe {
+
 $methods
 
 } // namespace probe
@@ -67,7 +68,7 @@ $methods
 """)
 
 template_scoped_decl = string.Template("""
-class CORE_EXPORT ${name} {
+class CORE_EXPORT ${name} : public ProbeBase {
     STACK_ALLOCATED()
 public:
     explicit $name($param_list);