Bug 1285566 - Create an EmulationActor and use per-tab API for touch simulator, r=jryans

MozReview-Commit-ID: 860epGLFO9

devtools/server/main.js

@@ -569,6 +569,11 @@ var DebuggerServer = {
       constructor: "PerformanceEntriesActor",
       type: { tab: true }
     });
+    this.registerModule("devtools/server/actors/emulation", {
+      prefix: "emulation",
+      constructor: "EmulationActor",
+      type: { tab: true }
+    });
   },
 
   /**