Block HTML Imports from loading when inserted via innerHTML.

third_party/WebKit/Source/core/html/HTMLLinkElement.h

Index: third_party/WebKit/Source/core/html/HTMLLinkElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLLinkElement.h b/third_party/WebKit/Source/core/html/HTMLLinkElement.h
index 735e8f7f22cf59907bcd05239d7e33a36217ea00..c0b0a7b72b8495fee841904c60d2a97d3c1a2484 100644
--- a/third_party/WebKit/Source/core/html/HTMLLinkElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLLinkElement.h
@@ -133,7 +133,7 @@ class CORE_EXPORT HTMLLinkElement final : public HTMLElement, public LinkLoaderC
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(HTMLLinkElement);
 public:
-    static PassRefPtrWillBeRawPtr<HTMLLinkElement> create(Document&, bool createdByParser);
+    static PassRefPtrWillBeRawPtr<HTMLLinkElement> create(Document&, bool createdByParser, bool alreadyStarted = false);

[dglazkov, 2016/02/05 18:25:53]

Can we use an enum bere?

https://www.chromium.org/blink/coding-style#TOC-Names

"Prefer enums to bools on function parameters if callers are likely to be
passing constants, since named constants are easier to read at the call site. An
exception to this rule is a setter function, where the name of the function
already makes clear what the boolean is."

[kouhei (in TOK), 2016/02/08 01:30:24]

+1
I prefer extending "bool createdByParser" to enum, and appending
CreatedByFragmentParser state there.

     ~HTMLLinkElement() override;
 
     KURL href() const;
@@ -177,6 +177,7 @@ public:
     bool isAlternate() const { return linkStyle()->isUnset() && m_relAttribute.isAlternate(); }
     bool shouldProcessStyle() { return linkResourceToProcess() && linkStyle(); }
     bool isCreatedByParser() const { return m_createdByParser; }
+    bool isAlreadyStarted() const { return m_alreadyStarted; }
 
     // Parse the icon size attribute into |iconSizes|, make this method public
     // visible for testing purpose.
@@ -185,7 +186,7 @@ public:
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    HTMLLinkElement(Document&, bool createdByParser);
+    HTMLLinkElement(Document&, bool createdByParser, bool alreadyStarted);

[dglazkov, 2016/02/05 18:25:53]

alreadyStarted is not clear in this context. What had started?

 
     LinkStyle* linkStyle() const;
     LinkImport* linkImport() const;
@@ -229,6 +230,7 @@ private:
     LinkRelAttribute m_relAttribute;
 
     bool m_createdByParser;
+    bool m_alreadyStarted;
     bool m_isInShadowTree;
 };