[inspector] introduce debug-interface.h

src/debug/debug.cc

Index: src/debug/debug.cc
diff --git a/src/debug/debug.cc b/src/debug/debug.cc
index 93fdd58273198aeec30cc8b0d42a35ae40e4b787..c5ce76f7fd2b5260c16e4d2c31853845f57d70b3 100644
--- a/src/debug/debug.cc
+++ b/src/debug/debug.cc
@@ -1838,8 +1838,8 @@ void Debug::CallEventCallback(v8::DebugEvent event,
   in_debug_event_listener_ = true;
   if (event_listener_->IsForeign()) {
     // Invoke the C debug event listener.
-    v8::Debug::EventCallback callback =
-        FUNCTION_CAST<v8::Debug::EventCallback>(
+    v8::DebugInterface::EventCallback callback =
+        FUNCTION_CAST<v8::DebugInterface::EventCallback>(
             Handle<Foreign>::cast(event_listener_)->foreign_address());
     EventDetailsImpl event_details(event,
                                    Handle<JSObject>::cast(exec_state),