Bug 1544170 Part 3 - Inspector changes to fetch style sheets from replaying process, r=pbro.

Differential Revision: https://phabricator.services.mozilla.com/D27410

--HG--
extra : rebase_source : a70fc90d042f7b9d0fdec65aadff911c90f8edf7

devtools/server/actors/stylesheets.js

@@ -19,6 +19,10 @@ loader.lazyRequireGetter(this, "addPseudoClassLock",
 loader.lazyRequireGetter(this, "removePseudoClassLock",
   "devtools/server/actors/highlighters/utils/markup", true);
 loader.lazyRequireGetter(this, "loadSheet", "devtools/shared/layout/utils", true);
+loader.lazyRequireGetter(this, "ReplayDebugger",
+  "devtools/server/actors/replay/debugger");
+loader.lazyRequireGetter(this, "ReplayInspector",
+  "devtools/server/actors/replay/inspector");
 
 var TRANSITION_PSEUDO_CLASS = ":-moz-styleeditor-transitioning";
 var TRANSITION_DURATION_MS = 500;
@@ -178,6 +182,13 @@ async function fetchStylesheet(sheet, consoleActor) {
     }
   }
 
+  // When replaying, fetch the stylesheets from the replaying process, so that
+  // we get the same sheets which were used when recording.
+  if (isReplaying) {
+    const dbg = new ReplayDebugger();
+    return dbg.replayingContent(href);
+  }
+
   const options = {
     loadFromCache: true,
     policy: Ci.nsIContentPolicy.TYPE_INTERNAL_STYLESHEET,
@@ -227,7 +238,7 @@ var StyleSheetActor = protocol.ActorClassWithSpec(styleSheetSpec, {
    * Window of target
    */
   get window() {
-    return this.parentActor.window;
+    return isReplaying ? ReplayInspector.window : this.parentActor.window;
   },
 
   /**
@@ -669,7 +680,8 @@ var StyleSheetsActor = protocol.ActorClassWithSpec(styleSheetsSpec, {
   async getStyleSheets() {
     let actors = [];
 
-    for (const win of this.parentActor.windows) {
+    const windows = isReplaying ? [ReplayInspector.window] : this.parentActor.windows;
+    for (const win of windows) {
       const sheets = await this._addStyleSheets(win);
       actors = actors.concat(sheets);
     }