[OriginTrials] Don't attempt to initialize origin trials in isolated worlds.

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

 /*
  * Copyright (C) 2008, 2009, 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 254 matching lines @@
         origin = m_world->isolatedWorldSecurityOrigin();
         setSecurityToken(origin);
     }
     if (m_frame->isLocalFrame()) {
         LocalFrame* frame = toLocalFrame(m_frame);
         MainThreadDebugger::instance()->contextCreated(m_scriptState.get(), frame, origin);
         frame->loader().client()->didCreateScriptContext(context, m_world->extensionGroup(), m_world->worldId());
     }
     // If Origin Trials have been registered before the V8 context was ready,
     // then inject them into the context now
-    ExecutionContext* executionContext = m_scriptState->getExecutionContext();
-    if (executionContext) {
-        OriginTrialContext* originTrialContext = OriginTrialContext::from(executionContext);
-        if (originTrialContext)
-            originTrialContext->initializePendingFeatures();
+    if (m_world->isMainWorld()) {
+        ExecutionContext* executionContext = m_scriptState->getExecutionContext();
+        if (executionContext) {
+            OriginTrialContext* originTrialContext = OriginTrialContext::from(executionContext);
+            if (originTrialContext)
+                originTrialContext->initializePendingFeatures();
+        }
     }
     return true;
 }
 
 void WindowProxy::createContext()
 {
     // FIXME: This should be a null check of m_frame->client(), but there are still some edge cases
     // that this fails to catch during frame detach.
     if (m_frame->isLocalFrame() && !toLocalFrame(m_frame)->loader().documentLoader())
         return;
@@ skipping 263 matching lines @@
 }
 
 void WindowProxy::updateSecurityOrigin(SecurityOrigin* origin)
 {
     if (!isContextInitialized())
         return;
     setSecurityToken(origin);
 }
 
 } // namespace blink