[Worklets] Add basic debugging to main thread worklets.

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 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/inspector/MainThreadDebugger.h"
 
 #include "bindings/core/v8/BindingSecurity.h"
 #include "bindings/core/v8/DOMWrapperWorld.h"
 #include "bindings/core/v8/V8Window.h"
+#include "core/dom/ExecutionContext.h"
 #include "core/frame/FrameConsole.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/UseCounter.h"
 #include "core/inspector/InspectorTaskRunner.h"
+#include "core/workers/MainThreadWorkletGlobalScope.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/v8_inspector/public/V8Debugger.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/ThreadingPrimitives.h"
 
 namespace blink {
 
 namespace {
 
@@ skipping 85 matching lines @@
 }
 
 void MainThreadDebugger::unmuteWarningsAndDeprecations()
 {
     FrameConsole::unmute();
     UseCounter::unmuteForInspector();
 }
 
 bool MainThreadDebugger::callingContextCanAccessContext(v8::Local<v8::Context> calling, v8::Local<v8::Context> target)
 {
+    ExecutionContext* executionContext = toExecutionContext(target);
+    ASSERT(executionContext);
+
+    if (executionContext->isWorkletGlobalScope()) {
+        MainThreadWorkletGlobalScope* globalScope = toMainThreadWorkletGlobalScope(executionContext);
+        return globalScope && BindingSecurity::shouldAllowAccessTo(m_isolate, toLocalDOMWindow(toDOMWindow(calling)), globalScope, DoNotReportSecurityError);
+    }
+
     DOMWindow* window = toDOMWindow(target);
     return window && BindingSecurity::shouldAllowAccessTo(m_isolate, toLocalDOMWindow(toDOMWindow(calling)), window, DoNotReportSecurityError);
 }
 
 } // namespace blink