Implement a ProfilerActor struct.

This is sufficient to make the profiler tab show up in Firefox's devtools.

components/devtools/actors/profiler.rs

@@ -0,0 +1,34 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use actor::{Actor, ActorRegistry};
+
+use rustc_serialize::json;
+use std::net::TcpStream;
+
+pub struct ProfilerActor {
+    name: String,
+}
+
+impl Actor for ProfilerActor {
+    fn name(&self) -> String {
+        self.name.clone()
+    }
+
+    fn handle_message(&self,
+                      _registry: &ActorRegistry,
+                      _msg_type: &str,
+                      _msg: &json::Object,
+                      _stream: &mut TcpStream) -> Result<bool, ()> {
+        Ok(false)
+    }
+}
+
+impl ProfilerActor {
+    pub fn new(name: String) -> ProfilerActor {
+        ProfilerActor {
+            name: name,
+        }
+    }
+}

components/devtools/actors/tab.rs

@@ -62,6 +62,7 @@ pub struct TabActorMsg {
     consoleActor: String,
     inspectorActor: String,
     timelineActor: String,
+    profilerActor: String,
 }
 
 pub struct TabActor {
@@ -71,6 +72,7 @@ pub struct TabActor {
     pub console: String,
     pub inspector: String,
     pub timeline: String,
+    pub profiler: String,
 }
 
 impl Actor for TabActor {
@@ -147,6 +149,7 @@ impl TabActor {
             consoleActor: self.console.clone(),
             inspectorActor: self.inspector.clone(),
             timelineActor: self.timeline.clone(),
+            profilerActor: self.profiler.clone(),
         }
     }
 }

components/devtools/lib.rs

@@ -41,6 +41,7 @@ use actors::console::ConsoleActor;
 use actors::network_event::{NetworkEventActor, EventActor, ResponseStartMsg};
 use actors::framerate::FramerateActor;
 use actors::inspector::InspectorActor;
+use actors::profiler::ProfilerActor;
 use actors::root::RootActor;
 use actors::tab::TabActor;
 use actors::timeline::TimelineActor;
@@ -73,6 +74,7 @@ mod actors {
     pub mod memory;
     pub mod network_event;
     pub mod object;
+    pub mod profiler;
     pub mod root;
     pub mod tab;
     pub mod timeline;
@@ -203,7 +205,7 @@ fn run_server(sender: Sender<DevtoolsControlMsg>,
         let (pipeline, worker_id) = ids;
 
         //TODO: move all this actor creation into a constructor method on TabActor
-        let (tab, console, inspector, timeline) = {
+        let (tab, console, inspector, timeline, profiler) = {
             let console = ConsoleActor {
                 name: actors.new_name("console"),
                 script_chan: script_sender.clone(),
@@ -224,6 +226,8 @@ fn run_server(sender: Sender<DevtoolsControlMsg>,
                                               script_sender,
                                               devtools_sender);
 
+            let profiler = ProfilerActor::new(actors.new_name("profiler"));
+
             let DevtoolsPageInfo { title, url } = page_info;
             let tab = TabActor {
                 name: actors.new_name("tab"),
@@ -232,11 +236,13 @@ fn run_server(sender: Sender<DevtoolsControlMsg>,
                 console: console.name(),
                 inspector: inspector.name(),
                 timeline: timeline.name(),
+                profiler: profiler.name(),
             };
 
             let root = actors.find_mut::<RootActor>("root");
             root.tabs.push(tab.name.clone());
-            (tab, console, inspector, timeline)
+
+            (tab, console, inspector, timeline, profiler)
         };
 
         if let Some(id) = worker_id {
@@ -254,6 +260,7 @@ fn run_server(sender: Sender<DevtoolsControlMsg>,
         actors.register(box console);
         actors.register(box inspector);
         actors.register(box timeline);
+        actors.register(box profiler);
     }
 
     fn handle_console_message(actors: Arc<Mutex<ActorRegistry>>,