WIP: Give developers an opt-in mechanism to block some parser-inserted scripts.

third_party/WebKit/Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 206 matching lines @@
   // Aliases by callers.
   // Clone a node: https://dom.spec.whatwg.org/#concept-node-clone
   CreatedByCloneNode = AsynchronousCustomElements,
   CreatedByImportNode = CreatedByCloneNode,
   // https://dom.spec.whatwg.org/#dom-document-createelement
   CreatedByCreateElement = SynchronousCustomElements,
   // https://html.spec.whatwg.org/#create-an-element-for-the-token
   CreatedByFragmentParser = CreatedByParser | AsynchronousCustomElements,
 };
 
+enum SrcdocType {

[jochen (gone - plz use gerrit), 2017/01/27 15:14:19]

nit. enum class. enum constants should start with k

+  NotSrcdoc,
+  Srcdoc,
+  FragmentParserCreatedSrcdoc,
+  DocumentWriteCreatedSrcdoc
+};
+
 // Collect data about deferred loading of offscreen cross-origin documents. All
 // cross-origin documents log Created. Only those that would load log a reason.
 // We can then see the % of cross-origin documents that never have to load.
 // See https://crbug.com/635105.
 // Logged to UMA, don't re-arrange entries without creating a new histogram.
 enum WouldLoadReason {
   Created,
   // If outer and inner frames aren't in the same process we can't determine
   // if the inner frame is visible, so just load it.
   // TODO(dgrogan): Revisit after https://crbug.com/650433 is fixed.
@@ skipping 190 matching lines @@
     return m_documentClasses & PluginDocumentClass;
   }
   bool isMediaDocument() const {
     return m_documentClasses & MediaDocumentClass;
   }
 
   bool hasSVGRootNode() const;
 
   bool isFrameSet() const;
 
-  bool isSrcdocDocument() const { return m_isSrcdocDocument; }
+  bool isSrcdocDocument() const { return m_srcdocType != NotSrcdoc; }
   bool isMobileDocument() const { return m_isMobileDocument; }
 
   // True if this document is an IFrame srcdoc document, and the frame in which
-  // it lives was created by a fragment parser (e.g. 'innerHTML').
+  // it lives was created by a fragment parser (e.g. 'innerHTML') or
+  // 'document.write', respectively.
   bool isFragmentParserCreatedSrcdoc() const {
-    return m_isFragmentParserCreatedSrcdoc;
+    return m_srcdocType == FragmentParserCreatedSrcdoc;
+  }
+  bool isDocumentWriteCreatedSrcdoc() const {
+    return m_srcdocType == DocumentWriteCreatedSrcdoc;
   }
 
   StyleResolver* styleResolver() const;
   StyleResolver& ensureStyleResolver() const;
 
   bool isViewSource() const { return m_isViewSource; }
   void setIsViewSource(bool);
 
   bool sawElementsInKnownNamespaces() const {
     return m_sawElementsInKnownNamespaces;
@@ skipping 1137 matching lines @@
   // the stack and cleared upon leaving its allocated scope. Hence it
   // is acceptable not to trace it -- should a conservative GC occur,
   // the cache object's references will be traced by a stack walk.
   GC_PLUGIN_IGNORE("461878")
   NthIndexCache* m_nthIndexCache = nullptr;
 
   DocumentClassFlags m_documentClasses;
 
   bool m_isViewSource;
   bool m_sawElementsInKnownNamespaces;
-  bool m_isSrcdocDocument;
+  SrcdocType m_srcdocType;
   bool m_isMobileDocument;
   bool m_isFragmentParserCreatedSrcdoc;
+  bool m_isDocumentWriteCreatedSrcdoc;
 
   LayoutView* m_layoutView;
 
   WeakMember<Document> m_contextDocument;
 
   // For early return in Fullscreen::fromIfExists()
   bool m_hasFullscreenSupplement;
 
   HeapVector<Member<Element>> m_topLayerElements;
 
@@ skipping 115 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLiveDocumentInstances();
 #endif
 
 #endif  // Document_h