[DevTools] Explicitly reset context group when clearing ScriptController.

third_party/WebKit/Source/core/inspector/MainThreadDebugger.cpp

 /*
  * Copyright (c) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 82 matching lines @@
     s_instance = nullptr;
 }
 
 void MainThreadDebugger::setClientMessageLoop(PassOwnPtr<ClientMessageLoop> clientMessageLoop)
 {
     ASSERT(!m_clientMessageLoop);
     ASSERT(clientMessageLoop);
     m_clientMessageLoop = std::move(clientMessageLoop);
 }
 
+void MainThreadDebugger::didClearContextsForFrame(LocalFrame* frame)
+{
+    DCHECK(isMainThread());
+    if (frame->localFrameRoot() == frame)
+        debugger()->resetContextGroup(contextGroupId(frame));
+}
+
 void MainThreadDebugger::contextCreated(ScriptState* scriptState, LocalFrame* frame, SecurityOrigin* origin)
 {
     ASSERT(isMainThread());
     v8::HandleScope handles(scriptState->isolate());
     DOMWrapperWorld& world = scriptState->world();
-    if (frame->localFrameRoot() == frame && world.isMainWorld())
-        debugger()->resetContextGroup(contextGroupId(frame));
     debugger()->contextCreated(V8ContextInfo(scriptState->context(), contextGroupId(frame), world.isMainWorld(), origin ? origin->toRawString() : "", world.isIsolatedWorld() ? world.isolatedWorldHumanReadableName() : "", IdentifiersFactory::frameId(frame), scriptState->getExecutionContext()->isDocument()));
 }
 
 void MainThreadDebugger::contextWillBeDestroyed(ScriptState* scriptState)
 {
     v8::HandleScope handles(scriptState->isolate());
     debugger()->contextDestroyed(scriptState->context());
 }
 
 int MainThreadDebugger::contextGroupId(LocalFrame* frame)
@@ skipping 214 matching lines @@
                 return;
             if (!nodes->Set(context, index++, toV8(node, info.Holder(), info.GetIsolate())).FromMaybe(false))
                 return;
         }
         info.GetReturnValue().Set(nodes);
     }
     exceptionState.throwIfNeeded();
 }
 
 } // namespace blink