Propagate inert state to OOPIFs when a modal dialog is active

third_party/WebKit/public/web/WebFrameWidget.h

Index: third_party/WebKit/public/web/WebFrameWidget.h
diff --git a/third_party/WebKit/public/web/WebFrameWidget.h b/third_party/WebKit/public/web/WebFrameWidget.h
index da2f08879266d0c46b1f7e4b90106204e2efd235..6801186942e3e2fcfbfec4e92a2d92bd517e7929 100644
--- a/third_party/WebKit/public/web/WebFrameWidget.h
+++ b/third_party/WebKit/public/web/WebFrameWidget.h
@@ -124,6 +124,10 @@ class WebFrameWidget : public WebWidget {
   // This is needed for out-of-process iframes to know if they are clipped
   // by ancestor frames in another process.
   virtual void SetRemoteViewportIntersection(const WebRect&) {}
+
+  // Sets the inert bit on an out-of-process iframe, causing it to ignore
+  // input.
+  virtual void SetIsInert(bool) {}
 };
 
 }  // namespace blink