Rename Document::ownerElement to localOwner and fix main frame checks.

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 43ed093dbc516aaf3c216bd60c42fe9ce8952af6..e047786c4634519804cdf62e73eb90ec6728d0f1 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -691,9 +691,9 @@ public:
     void updateViewportDescription();
     void processReferrerPolicy(const String& policy);
 
-    // Returns the owning element in the parent document.
-    // Returns nullptr if this is the top level document.
-    HTMLFrameOwnerElement* ownerElement() const;
+    // Returns the owning element in the parent document. Returns nullptr if
+    // this is the top level document or the owner is remote.
+    HTMLFrameOwnerElement* localOwner() const;
 
     // Returns true if this document belongs to a frame that the parent document
     // made invisible (for instance by setting as style display:none).
@@ -1065,6 +1065,8 @@ public:
     void setRootScroller(Element*, ExceptionState&);
     Element* rootScroller();
 
+    bool isInMainFrame() const;
+
 protected:
     Document(const DocumentInit&, DocumentClassFlags = DefaultDocumentClass);