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

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

Index: third_party/WebKit/Source/core/dom/Document.h
diff --git a/third_party/WebKit/Source/core/dom/Document.h b/third_party/WebKit/Source/core/dom/Document.h
index f4b3d4b85eaa081b97540e286c804ac805782bd5..22e518360217c2221b789bc11374de9a2eaa6b1c 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -224,6 +224,13 @@ enum CreateElementFlags {
   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.
@@ -434,13 +441,17 @@ class CORE_EXPORT Document : public ContainerNode,
 
   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;
@@ -1598,9 +1609,10 @@ class CORE_EXPORT Document : public ContainerNode,
 
   bool m_isViewSource;
   bool m_sawElementsInKnownNamespaces;
-  bool m_isSrcdocDocument;
+  SrcdocType m_srcdocType;
   bool m_isMobileDocument;
   bool m_isFragmentParserCreatedSrcdoc;
+  bool m_isDocumentWriteCreatedSrcdoc;
 
   LayoutView* m_layoutView;