Make document.activeElement work with OOPIF

third_party/WebKit/Source/core/page/FocusController.h

Index: third_party/WebKit/Source/core/page/FocusController.h
diff --git a/third_party/WebKit/Source/core/page/FocusController.h b/third_party/WebKit/Source/core/page/FocusController.h
index 1fcfbff0c48b81c0ba1730dd8e6cbd7997780df2..68e2a9cceb64a0ab7ab02542be71cb57c1327855 100644
--- a/third_party/WebKit/Source/core/page/FocusController.h
+++ b/third_party/WebKit/Source/core/page/FocusController.h
@@ -39,6 +39,7 @@ namespace blink {
 struct FocusCandidate;
 class Element;
 class Frame;
+class HTMLFrameOwnerElement;
 class InputDeviceCapabilities;
 class LocalFrame;
 class Node;
@@ -54,6 +55,11 @@ public:
     LocalFrame* focusedFrame() const;
     Frame* focusedOrMainFrame() const;
 
+    // Finds the focused HTMLFrameOwnerElement, if any, in the provided frame.
+    // An HTMLFrameOwnerElement is considered focused if the frame it owns, or
+    // one of its descendant frames, is currently focused.
+    HTMLFrameOwnerElement* focusedFrameOwnerElement(LocalFrame& currentFrame) const;
+
     bool setInitialFocus(WebFocusType);
     bool advanceFocus(WebFocusType type, InputDeviceCapabilities* sourceCapabilities = nullptr) { return advanceFocus(type, false, sourceCapabilities); }
     Element* findFocusableElement(WebFocusType, Node&);