Support loading trial tokens from HTTP headers.

third_party/WebKit/Source/core/loader/FrameLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 56 matching lines @@
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FormSubmission.h"
 #include "core/loader/FrameLoadRequest.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/loader/LinkLoader.h"
 #include "core/loader/MixedContentChecker.h"
 #include "core/loader/NavigationScheduler.h"
 #include "core/loader/NetworkHintsInterface.h"
 #include "core/loader/ProgressTracker.h"
 #include "core/loader/appcache/ApplicationCacheHost.h"
+#include "core/origin_trials/OriginTrialContext.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/CreateWindow.h"
 #include "core/page/FrameTree.h"
 #include "core/page/Page.h"
 #include "core/page/WindowFeatures.h"
 #include "core/page/scrolling/ScrollingCoordinator.h"
 #include "core/svg/graphics/SVGImage.h"
 #include "core/xml/parser/XMLDocumentParser.h"
 #include "platform/Logging.h"
 #include "platform/PluginScriptForbiddenScope.h"
@@ skipping 386 matching lines @@
             m_frame->document()->parseDNSPrefetchControlHeader(dnsPrefetchControl);
 
         String headerContentLanguage = m_documentLoader->response().httpHeaderField(HTTPNames::Content_Language);
         if (!headerContentLanguage.isEmpty()) {
             size_t commaIndex = headerContentLanguage.find(',');
             headerContentLanguage.truncate(commaIndex); // kNotFound == -1 == don't truncate
             headerContentLanguage = headerContentLanguage.stripWhiteSpace(isHTMLSpace<UChar>);
             if (!headerContentLanguage.isEmpty())
                 m_frame->document()->setContentLanguage(AtomicString(headerContentLanguage));
         }
+
+        OriginTrialContext::addTokensFromHeader(m_frame->document(), m_documentLoader->response().httpHeaderField(HTTPNames::Origin_Trial));
     }
 
     if (m_provisionalItem && isBackForwardLoadType(m_loadType))
         m_frame->document()->setStateForNewFormElements(m_provisionalItem->documentState());
 
     client()->didCreateNewDocument();
 }
 
 void FrameLoader::finishedParsing()
 {
@@ skipping 1071 matching lines @@
     // FIXME: We need a way to propagate insecure requests policy flags to
     // out-of-process frames. For now, we'll always use default behavior.
     if (!parentFrame->isLocalFrame())
         return nullptr;
 
     ASSERT(toLocalFrame(parentFrame)->document());
     return toLocalFrame(parentFrame)->document()->insecureNavigationsToUpgrade();
 }
 
 } // namespace blink