[DevTools] Remove handlers = browser from protocol definition.

content/browser/devtools/protocol/memory_handler.cc

Index: content/browser/devtools/protocol/memory_handler.cc
diff --git a/content/browser/devtools/protocol/memory_handler.cc b/content/browser/devtools/protocol/memory_handler.cc
index 2670642779ee712edebaecd114b41c4765d5387e..58a12fd9c29a43edccd4caecc9838241215d7f45 100644
--- a/content/browser/devtools/protocol/memory_handler.cc
+++ b/content/browser/devtools/protocol/memory_handler.cc
@@ -46,6 +46,13 @@ MemoryHandler::Response MemoryHandler::SimulatePressureNotification(
   return Response::OK();
 }
 
+MemoryHandler::Response MemoryHandler::GetDOMCounters(
+    int* documents,
+    int* nodes,
+    int* event_listeners) {
+  return Response::FallThrough();
+}
+
 }  // namespace memory
 }  // namespace devtools
 }  // namespace content