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

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

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index 149561f8cdad9baddb47a9948cd30cacaa9c6487..c78651f2c5243571ee764c50a397e5a9265f8206 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -456,9 +456,8 @@ Document::Document(const DocumentInit& initializer,
       m_documentClasses(documentClasses),
       m_isViewSource(false),
       m_sawElementsInKnownNamespaces(false),
-      m_isSrcdocDocument(false),
+      m_srcdocType(NotSrcdoc),
       m_isMobileDocument(false),
-      m_isFragmentParserCreatedSrcdoc(false),
       m_layoutView(0),
       m_contextDocument(initializer.contextDocument()),
       m_hasFullscreenSupplement(false),
@@ -5481,14 +5480,18 @@ void Document::initSecurityContext(const DocumentInit& initializer) {
   }
 
   if (initializer.shouldTreatURLAsSrcdocDocument()) {
-    m_isSrcdocDocument = true;
+    m_srcdocType = Srcdoc;
     setBaseURLOverride(initializer.parentBaseURL());
 
     if (Element* owner = domWindow()->frameElement()) {
       HTMLIFrameElement* iframe = toHTMLIFrameElement(owner);
-      m_isFragmentParserCreatedSrcdoc =
-          iframe->createdByFragmentParser() ||
-          iframe->document().isFragmentParserCreatedSrcdoc();
+      if (iframe->createdByFragmentParser() ||
+          iframe->document().isFragmentParserCreatedSrcdoc()) {
+        m_srcdocType = FragmentParserCreatedSrcdoc;
+      } else if (iframe->createdByDocumentWrite() ||
+                 iframe->document().isDocumentWriteCreatedSrcdoc()) {
+        m_srcdocType = DocumentWriteCreatedSrcdoc;
+      }
     }
   }