Remove RenderViewObserver::ZoomLevelChanged.

components/autofill/content/renderer/autofill_agent.cc

Index: components/autofill/content/renderer/autofill_agent.cc
diff --git a/components/autofill/content/renderer/autofill_agent.cc b/components/autofill/content/renderer/autofill_agent.cc
index cde97a0e8db5c5815bee1e808237f5ffaf3c176a..ee551eedea8498c612100233aa6ca9a47b2ae213 100644
--- a/components/autofill/content/renderer/autofill_agent.cc
+++ b/components/autofill/content/renderer/autofill_agent.cc
@@ -212,13 +212,6 @@ void AutofillAgent::WillSubmitForm(WebLocalFrame* frame,
   }
 }
 
-void AutofillAgent::ZoomLevelChanged() {
-  // Any time the zoom level changes, the page's content moves, so any Autofill
-  // popups should be hidden. This is only needed for the new Autofill UI
-  // because WebKit already knows to hide the old UI when this occurs.
-  HidePopup();
-}
-
 void AutofillAgent::FocusedNodeChanged(const WebNode& node) {
   if (password_generation_agent_ &&
       password_generation_agent_->FocusedNodeHasChanged(node)) {