Null check FocusedFrame in spatial navigation

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 217b52178ece193c1a0bd537541765afc5ff7e04..7e77fe49a37135adefe33a1bc9babd19b52ac773 100644
--- a/third_party/WebKit/Source/core/page/FocusController.cpp
+++ b/third_party/WebKit/Source/core/page/FocusController.cpp
@@ -1342,9 +1342,11 @@ bool FocusController::AdvanceFocusDirectionallyInContainer(
   DCHECK(element);
 
   if (!element->IsTextControl() && !HasEditableStyle(*element->ToNode())) {
-    // To fulfill the expectation of spatial-navigation/snav-input.html
+    // To fulfill the expectation of spatial-navigation/snav-textarea.html
     // we clear selection when spatnav moves focus away from a text-field.
-    FocusedFrame()->Selection().Clear();
+    // TODO(hugoh@opera.com): crbug.com/734552 remove Selection.Clear()
+    if (FocusedFrame())
+      FocusedFrame()->Selection().Clear();
   }
   element->focus(FocusParams(SelectionBehaviorOnFocus::kReset, type, nullptr));
   return true;