Bug 1570688 - Remove UrlbarController::viewContextChanged. r=mak

Differential Revision: https://phabricator.services.mozilla.com/D40229

--HG--
extra : moz-landing-system : lando

browser/components/urlbar/UrlbarController.jsm

@@ -217,16 +217,6 @@ class UrlbarController {
     this._listeners.delete(listener);
   }
 
-  /**
-   * When the containing context changes (for example when switching tabs),
-   * clear any caches that connects consecutive searches in the same context.
-   * For example it can be used to clear information used to improve autofill
-   * or save resourced on repeated searches.
-   */
-  viewContextChanged() {
-    this.cancelQuery();
-  }
-
   /**
    * Checks whether a keyboard event that would normally open the view should
    * instead be handled natively by the input field.

browser/components/urlbar/UrlbarInput.jsm

@@ -1704,7 +1704,6 @@ class UrlbarInput {
 
   _on_TabSelect(event) {
     this._resetSearchState();
-    this.controller.viewContextChanged();
   }
 
   _on_keydown(event) {

browser/components/urlbar/docs/overview.rst

@@ -246,9 +246,6 @@ View (e.g. showing/hiding a panel). It is also responsible for reporting Telemet
     // Used by the View to listen for results.
     addQueryListener(listener);
     removeQueryListener(listener);
-    // Used to indicate the View context changed, so that cached information
-    // about the latest search is no more relevant and can be dropped.
-    viewContextChanged();
   }