Experiment with blocking script inside fragment-parser-inserted `<iframe srcdoc>`.

third_party/WebKit/Source/core/html/HTMLIFrameElementTest.cpp

Index: third_party/WebKit/Source/core/html/HTMLIFrameElementTest.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLIFrameElementTest.cpp b/third_party/WebKit/Source/core/html/HTMLIFrameElementTest.cpp
index 2651ecb15fc222ea76df288f677cf198de81671c..0d579c1f3f286b1fb13320bd23425bf2db48d8ee 100644
--- a/third_party/WebKit/Source/core/html/HTMLIFrameElementTest.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLIFrameElementTest.cpp
@@ -12,7 +12,7 @@ namespace blink {
 // Test setting via the Element attribute (HTML codepath).
 TEST(HTMLIFrameElementTest, SetPermissionsAttribute) {
   Document* document = Document::create();
-  HTMLIFrameElement* iframe = HTMLIFrameElement::create(*document);
+  HTMLIFrameElement* iframe = HTMLIFrameElement::create(*document, false);
 
   iframe->setAttribute(HTMLNames::permissionsAttr, "geolocation");
   EXPECT_EQ("geolocation", iframe->permissions()->value());
@@ -23,7 +23,7 @@ TEST(HTMLIFrameElementTest, SetPermissionsAttribute) {
 // Test setting via the DOMTokenList (JS codepath).
 TEST(HTMLIFrameElementTest, SetPermissionsAttributeJS) {
   Document* document = Document::create();
-  HTMLIFrameElement* iframe = HTMLIFrameElement::create(*document);
+  HTMLIFrameElement* iframe = HTMLIFrameElement::create(*document, false);
 
   iframe->permissions()->setValue("midi");
   EXPECT_EQ("midi", iframe->getAttribute(HTMLNames::permissionsAttr));