Move asserts in FocusNavigationController.

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

Index: third_party/WebKit/Source/core/page/FocusController.cpp
diff --git a/third_party/WebKit/Source/core/page/FocusController.cpp b/third_party/WebKit/Source/core/page/FocusController.cpp
index 42e6f3d80c8630ca756b7d8216f3c31352b41323..d4de93aa6b6bc5bfc54549ff2b8243fa6b80606d 100644
--- a/third_party/WebKit/Source/core/page/FocusController.cpp
+++ b/third_party/WebKit/Source/core/page/FocusController.cpp
@@ -364,13 +364,6 @@ inline bool isShadowHostWithoutCustomFocusLogic(const Element& element)
     return isShadowHost(element) && !hasCustomFocusLogic(element);
 }
 
-#if ENABLE(ASSERT)
-inline bool isNonFocusableShadowHost(const Element& element)
-{
-    return isShadowHostWithoutCustomFocusLogic(element) && !element.isFocusable();
-}
-#endif
-
 inline bool isNonKeyboardFocusableShadowHost(const Element& element)
 {
     return isShadowHostWithoutCustomFocusLogic(element) && !(element.shadowRootIfV1() ? element.isFocusable() : element.isKeyboardFocusable());
@@ -646,7 +639,6 @@ Element* findFocusableElementDescendingDownIntoFrameDocument(WebFocusType type,
 Element* findFocusableElementAcrossFocusScopesForward(ScopedFocusNavigation& scope)
 {
     Element* current = scope.currentElement();
-    ASSERT(!current || !isNonFocusableShadowHost(*current));
     Element* found;
     if (current && isShadowHostWithoutCustomFocusLogic(*current)) {
         ScopedFocusNavigation innerScope = ScopedFocusNavigation::ownedByShadowHost(*current);
@@ -670,7 +662,6 @@ Element* findFocusableElementAcrossFocusScopesForward(ScopedFocusNavigation& sco
 
 Element* findFocusableElementAcrossFocusScopesBackward(ScopedFocusNavigation& scope)
 {
-    ASSERT(!scope.currentElement() || !isNonFocusableShadowHost(*scope.currentElement()));
     Element* found = findFocusableElementRecursivelyBackward(scope);
 
     // If there's no focusable element to advance to, move up the focus scopes until we find one.
@@ -979,6 +970,8 @@ bool FocusController::advanceFocusInDocumentOrder(LocalFrame* frame, Element* st
         return true;
     }
 
+    ASSERT(element->isFocusable());
+
     // FIXME: It would be nice to just be able to call setFocusedElement(element)
     // here, but we can't do that because some elements (e.g. HTMLInputElement
     // and HTMLTextAreaElement) do extra work in their focus() methods.