Bug 1264873 - Ensure exposing memory actor for the browser content toolbox. r=yulia

MozReview-Commit-ID: 3duHXef13M4

--HG--
extra : rebase_source : 8f372fedbbfe59ec7c2756bde61450e67f46345a

devtools/server/actors/targets/content-process.js

@@ -22,6 +22,7 @@ const { assert } = require("devtools/shared/DevToolsUtils");
 const { TabSources } = require("devtools/server/actors/utils/TabSources");
 
 loader.lazyRequireGetter(this, "WorkerTargetActorList", "devtools/server/actors/worker/worker-list", true);
+loader.lazyRequireGetter(this, "MemoryActor", "devtools/server/actors/memory", true);
 
 function ContentProcessTargetActor(connection) {
   this.conn = connection;
@@ -104,13 +105,17 @@ ContentProcessTargetActor.prototype = {
       this.threadActor = new ChromeDebuggerActor(this.conn, this);
       this._contextPool.addActor(this.threadActor);
     }
-
+    if (!this.memoryActor) {
+      this.memoryActor = new MemoryActor(this.conn, this);
+      this._contextPool.addActor(this.memoryActor);
+    }
     return {
       actor: this.actorID,
       name: "Content process",
 
       consoleActor: this._consoleActor.actorID,
       chromeDebugger: this.threadActor.actorID,
+      memoryActor: this.memoryActor.actorID,
 
       traits: {
         highlightable: false,

devtools/server/performance/memory.js

@@ -418,8 +418,14 @@ Memory.prototype = {
    * Accesses the docshell to return the current process time.
    */
   _getCurrentTime: function() {
-    return (this.parent.isRootActor ? this.parent.docShell :
-                                      this.parent.originalDocShell).now();
+    const docShell = this.parent.isRootActor ? this.parent.docShell :
+                     this.parent.originalDocShell;
+    if (docShell) {
+      return docShell.now();
+    }
+    // When used from the ContentProcessTargetActor, parent has no docShell,
+    // so fallback to Cu.now
+    return Cu.now();
   },
 };