[DevTools] Explicitly reset context group when clearing ScriptController.

third_party/WebKit/Source/bindings/core/v8/ScriptController.cpp

 /*
  * Copyright (C) 2008, 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Opera Software ASA. 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
@@ skipping 38 matching lines @@
 #include "core/events/Event.h"
 #include "core/events/EventListener.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/Settings.h"
 #include "core/frame/UseCounter.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/html/HTMLPlugInElement.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/inspector/InspectorTraceEvents.h"
+#include "core/inspector/MainThreadDebugger.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/loader/NavigationScheduler.h"
 #include "core/loader/ProgressTracker.h"
 #include "core/plugins/PluginView.h"
 #include "platform/Histogram.h"
 #include "platform/TraceEvent.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/Widget.h"
@@ skipping 22 matching lines @@
 }
 
 DEFINE_TRACE(ScriptController)
 {
     visitor->trace(m_windowProxyManager);
 }
 
 void ScriptController::clearForClose()
 {
     m_windowProxyManager->clearForClose();
+    MainThreadDebugger::instance()->didClearContextsForFrame(frame());
 }
 
 void ScriptController::updateSecurityOrigin(SecurityOrigin* origin)
 {
     m_windowProxyManager->mainWorldProxy()->updateSecurityOrigin(origin);
     Vector<std::pair<ScriptState*, SecurityOrigin*>> isolatedContexts;
     m_windowProxyManager->collectIsolatedContexts(isolatedContexts);
     for (auto isolatedContext : isolatedContexts)
         m_windowProxyManager->windowProxy(isolatedContext.first->world())->updateSecurityOrigin(isolatedContext.second);
 }
@@ skipping 147 matching lines @@
     }
     v8::RegisterExtension(extension);
     registeredExtensions().append(extension);
 }
 
 void ScriptController::clearWindowProxy()
 {
     // V8 binding expects ScriptController::clearWindowProxy only be called
     // when a frame is loading a new page. This creates a new context for the new page.
     m_windowProxyManager->clearForNavigation();
+    MainThreadDebugger::instance()->didClearContextsForFrame(frame());
 }
 
 void ScriptController::setCaptureCallStackForUncaughtExceptions(v8::Isolate* isolate, bool value)
 {
     isolate->SetCaptureStackTraceForUncaughtExceptions(value, V8StackTrace::maxCallStackSizeToCapture, stackTraceOptions);
 }
 
 void ScriptController::collectIsolatedContexts(Vector<std::pair<ScriptState*, SecurityOrigin*>>& result)
 {
     m_windowProxyManager->collectIsolatedContexts(result);
@@ skipping 164 matching lines @@
         for (size_t i = 0; i < resultArray->Length(); ++i) {
             v8::Local<v8::Value> value;
             if (!resultArray->Get(scriptState->context(), i).ToLocal(&value))
                 return;
             results->append(value);
         }
     }
 }
 
 } // namespace blink