diff --git a/chromium/v8/src/inspector/v8-debugger-agent-impl.cc b/chromium/v8/src/inspector/v8-debugger-agent-impl.cc
index 399fa4c40934..bd948cd8ac1c 100644
--- a/chromium/v8/src/inspector/v8-debugger-agent-impl.cc
+++ b/chromium/v8/src/inspector/v8-debugger-agent-impl.cc
@@ -499,6 +499,8 @@ Response V8DebuggerAgentImpl::setBreakpointByUrl(
     Maybe<int> optionalColumnNumber, Maybe<String16> optionalCondition,
     String16* outBreakpointId,
     std::unique_ptr<protocol::Array<protocol::Debugger::Location>>* locations) {
+  if (!enabled()) return Response::ServerError(kDebuggerNotEnabled);
+
   *locations = std::make_unique<Array<protocol::Debugger::Location>>();
 
   int specified = (optionalURL.isJust() ? 1 : 0) +
@@ -587,6 +589,8 @@ Response V8DebuggerAgentImpl::setBreakpoint(
   String16 breakpointId = generateBreakpointId(
       BreakpointType::kByScriptId, location->getScriptId(),
       location->getLineNumber(), location->getColumnNumber(0));
+  if (!enabled()) return Response::ServerError(kDebuggerNotEnabled);
+
   if (m_breakpointIdToDebuggerBreakpointIds.find(breakpointId) !=
       m_breakpointIdToDebuggerBreakpointIds.end()) {
     return Response::ServerError(
@@ -605,6 +609,8 @@ Response V8DebuggerAgentImpl::setBreakpoint(
 Response V8DebuggerAgentImpl::setBreakpointOnFunctionCall(
     const String16& functionObjectId, Maybe<String16> optionalCondition,
     String16* outBreakpointId) {
+  if (!enabled()) return Response::ServerError(kDebuggerNotEnabled);
+
   InjectedScript::ObjectScope scope(m_session, functionObjectId);
   Response response = scope.initialize();
   if (!response.IsSuccess()) return response;