Bug 1634448 - Remove some unused references to the old profiler popup iframe; r=canaltinova

These were left-over from the previous implementation.

Differential Revision: https://phabricator.services.mozilla.com/D75849

browser/themes/shared/toolbarbutton-icons.inc.css

@@ -260,10 +260,6 @@ toolbar[brighttext] {
   list-style-image: url("chrome://devtools/skin/images/profiler-stopwatch.svg");
 }
 
-#PanelUI-profilerIframe {
-  width: 450px;
-}
-
 #preferences-button {
   list-style-image: url("chrome://global/skin/icons/settings.svg");
 }

devtools/client/performance-new/test/browser/head.js

@@ -158,20 +158,6 @@ function maybeGetElementFromDocumentByText(document, text) {
   return getElementByXPath(document, xpath);
 }
 
-/**
- * Returns the popup's document.
- * @returns {Document}
- */
-function getIframeDocument() {
-  const iframe = document.getElementById("PanelUI-profilerIframe");
-  if (!iframe) {
-    throw new Error(
-      "This function assumes the profiler iframe is already present."
-    );
-  }
-  return iframe.contentDocument;
-}
-
 /**
  * Make sure the profiler popup is enabled.
  */
@@ -317,39 +303,6 @@ async function waitForTabTitle(title) {
   });
 }
 
-/**
- * Close the popup, and wait for it to be destroyed.
- */
-async function closePopup() {
-  const iframe = document.querySelector("#PanelUI-profilerIframe");
-
-  if (!iframe) {
-    throw new Error(
-      "Could not find the profiler iframe when attempting to close the popup. Was it " +
-        "already closed?"
-    );
-  }
-
-  const panel = iframe.closest("panel");
-  if (!panel) {
-    throw new Error(
-      "Could not find the closest panel to the profiler's iframe."
-    );
-  }
-
-  info("Hide the profiler popup.");
-  panel.hidePopup();
-
-  info("Wait for the profiler popup to be completely hidden.");
-  while (true) {
-    if (!iframe.ownerDocument.contains(iframe)) {
-      info("The iframe was removed.");
-      return;
-    }
-    await tick();
-  }
-}
-
 /**
  * Open about:profiling in a new tab, and output helpful log messages.
  *