[inspector] speculative avoid using debugger context as current in blink

src/inspector/v8-debugger.cc

Index: src/inspector/v8-debugger.cc
diff --git a/src/inspector/v8-debugger.cc b/src/inspector/v8-debugger.cc
index e8f7fb32f8a7b22c30e1bfce9391617c5416905d..5e0c8eae31d4a014dddc0f54f29e9464eb546c1e 100644
--- a/src/inspector/v8-debugger.cc
+++ b/src/inspector/v8-debugger.cc
@@ -488,6 +488,10 @@ void V8Debugger::handleProgramBreak(v8::Local<v8::Context> pausedContext,
     m_runningNestedMessageLoop = true;
     int groupId = m_inspector->contextGroupId(pausedContext);
     DCHECK(groupId);
+    v8::Context::Scope scope(pausedContext);
+    v8::Local<v8::Context> context = m_isolate->GetCurrentContext();
+    CHECK(!context.IsEmpty() &&
+          context != v8::Debug::GetDebugContext(m_isolate));
     m_inspector->client()->runMessageLoopOnPause(groupId);
     // The agent may have been removed in the nested loop.
     agent = m_inspector->enabledDebuggerAgentForGroup(