Backed out 4 changesets (bug 1543098) for high frequency browser_runt…

…ime_executionContext.js failures CLOSED TREE

Backed out changeset a414e99fbbc8 (bug 1543098)
Backed out changeset f5645934c8ec (bug 1543098)
Backed out changeset 142fc2db9173 (bug 1543098)
Backed out changeset 0a13ac4fa9d7 (bug 1543098)

remote/domains/content/Runtime.jsm

@@ -7,7 +7,6 @@
 var EXPORTED_SYMBOLS = ["Runtime"];
 
 const {ContentProcessDomain} = ChromeUtils.import("chrome://remote/content/domains/ContentProcessDomain.jsm");
-const {Services} = ChromeUtils.import("resource://gre/modules/Services.jsm");
 
 class Runtime extends ContentProcessDomain {
   constructor(session) {
@@ -24,96 +23,12 @@ class Runtime extends ContentProcessDomain {
   async enable() {
     if (!this.enabled) {
       this.enabled = true;
-      this.chromeEventHandler.addEventListener("DOMWindowCreated", this,
-        {mozSystemGroup: true});
-
-      // Listen for pageshow and pagehide to track pages going in/out to/from the BF Cache
-      this.chromeEventHandler.addEventListener("pageshow", this,
-        {mozSystemGroup: true});
-      this.chromeEventHandler.addEventListener("pagehide", this,
-        {mozSystemGroup: true});
-
-      Services.obs.addObserver(this, "inner-window-destroyed");
-
-      // Spin the event loop in order to send the `executionContextCreated` event right
-      // after we replied to `enable` request.
-      Services.tm.dispatchToMainThread(() => {
-        const frameId = this.content.windowUtils.outerWindowID;
-        const id = this.content.windowUtils.currentInnerWindowID;
-        this.emit("Runtime.executionContextCreated", {
-          context: {
-            id,
-            auxData: {
-              isDefault: true,
-              frameId,
-            },
-          },
-        });
-      });
     }
   }
 
   disable() {
     if (this.enabled) {
       this.enabled = false;
-      this.chromeEventHandler.removeEventListener("DOMWindowCreated", this,
-        {mozSystemGroup: true});
-      this.chromeEventHandler.removeEventListener("pageshow", this,
-        {mozSystemGroup: true});
-      this.chromeEventHandler.removeEventListener("pagehide", this,
-        {mozSystemGroup: true});
-      Services.obs.removeObserver(this, "inner-window-destroyed");
-    }
-  }
-
-  handleEvent({type, target, persisted}) {
-    const frameId = target.defaultView.windowUtils.outerWindowID;
-    const id = target.defaultView.windowUtils.currentInnerWindowID;
-    switch (type) {
-    case "DOMWindowCreated":
-      this.emit("Runtime.executionContextCreated", {
-        context: {
-          id,
-          auxData: {
-            isDefault: target == this.content.document,
-            frameId,
-          },
-        },
-      });
-      break;
-
-    case "pageshow":
-      // `persisted` is true when this is about a page being resurected from BF Cache
-      if (!persisted) {
-        return;
-      }
-      this.emit("Runtime.executionContextCreated", {
-        context: {
-          id,
-          auxData: {
-            isDefault: target == this.content.document,
-            frameId,
-          },
-        },
-      });
-      break;
-
-    case "pagehide":
-      // `persisted` is true when this is about a page being frozen into BF Cache
-      if (!persisted) {
-        return;
-      }
-      this.emit("Runtime.executionContextDestroyed", {
-        executionContextId: id,
-      });
-      break;
     }
   }
-
-  observe(subject, topic, data) {
-    const innerWindowID = subject.QueryInterface(Ci.nsISupportsPRUint64).data;
-    this.emit("Runtime.executionContextDestroyed", {
-      executionContextId: innerWindowID,
-    });
-  }
 }

remote/test/browser/browser.ini

@@ -9,6 +9,5 @@ skip-if = debug || asan # bug 1546945
 [browser_cdp.js]
 [browser_main_target.js]
 [browser_page_frameNavigated.js]
-[browser_runtime_executionContext.js]
 [browser_tabs.js]
 [browser_target.js]