Chromium Code Reviews| Index: third_party/WebKit/Source/core/dom/DocumentVisibilityObserver.h |
| diff --git a/third_party/WebKit/Source/core/dom/DocumentVisibilityObserver.h b/third_party/WebKit/Source/core/dom/DocumentVisibilityObserver.h |
| index 967de8b2767baa7d291d1f087da699bfd7d7ddc4..ae7efb7d84348d92196ec1e6136fcd3a652241a0 100644 |
| --- a/third_party/WebKit/Source/core/dom/DocumentVisibilityObserver.h |
| +++ b/third_party/WebKit/Source/core/dom/DocumentVisibilityObserver.h |
| @@ -20,6 +20,7 @@ public: |
| virtual ~DocumentVisibilityObserver(); |
| virtual void didChangeVisibilityState(PageVisibilityState) = 0; |
| + virtual void willDetachDocument() { }; |
|
Justin Novosad
2016/02/04 21:31:38
You could make this pure virtual ("= 0;" instead o
|
| // Classes that inherit Node and DocumentVisibilityObserver must have a |
| // virtual override of Node::didMoveToNewDocument that calls |