[inspector] Return error when paused in different context group

src/inspector/v8-debugger-agent-impl.cc

Index: src/inspector/v8-debugger-agent-impl.cc
diff --git a/src/inspector/v8-debugger-agent-impl.cc b/src/inspector/v8-debugger-agent-impl.cc
index 37c26e48801a40dbff88ae6c628fded8fc3355b0..f08aa0f52aaabfec5a457cf128cafd64768a6975 100644
--- a/src/inspector/v8-debugger-agent-impl.cc
+++ b/src/inspector/v8-debugger-agent-impl.cc
@@ -1035,9 +1035,7 @@ V8DebuggerAgentImpl::currentAsyncStackTrace() {
 }
 
 bool V8DebuggerAgentImpl::isPaused() const {
-  // TODO(dgozman): this check allows once context group to resume the other,
-  // since they share debugger.
-  return m_debugger->isPaused();
+  return m_debugger->isPausedInContextGroup(m_session->contextGroupId());
 }
 
 void V8DebuggerAgentImpl::didParseSource(